lib/ruby_units/unit_definitions/standard.rb in ruby-units-4.0.3 vs lib/ruby_units/unit_definitions/standard.rb in ruby-units-4.1.0

@@ -1,721 +1,723 @@
+# frozen_string_literal: true
+
 # length units
 
-RubyUnits::Unit.define('inch') do |inch|
-  inch.definition = RubyUnits::Unit.new('254/10000 meter')
+RubyUnits::Unit.define("inch") do |inch|
+  inch.definition = RubyUnits::Unit.new("254/10000 meter")
   inch.aliases    = %w[in inch inches "]
 end
 
-RubyUnits::Unit.define('foot') do |foot|
-  foot.definition = RubyUnits::Unit.new('12 inches')
+RubyUnits::Unit.define("foot") do |foot|
+  foot.definition = RubyUnits::Unit.new("12 inches")
   foot.aliases    = %w[ft foot feet ']
 end
 
-RubyUnits::Unit.define('survey-foot') do |sft|
-  sft.definition = RubyUnits::Unit.new('1200/3937 meter')
+RubyUnits::Unit.define("survey-foot") do |sft|
+  sft.definition = RubyUnits::Unit.new("1200/3937 meter")
   sft.aliases    = %w[sft sfoot sfeet]
 end
 
-RubyUnits::Unit.define('yard') do |yard|
-  yard.definition = RubyUnits::Unit.new('3 ft')
+RubyUnits::Unit.define("yard") do |yard|
+  yard.definition = RubyUnits::Unit.new("3 ft")
   yard.aliases    = %w[yd yard yards]
 end
 
-RubyUnits::Unit.define('mile') do |mile|
-  mile.definition = RubyUnits::Unit.new('5280 ft')
+RubyUnits::Unit.define("mile") do |mile|
+  mile.definition = RubyUnits::Unit.new("5280 ft")
   mile.aliases    = %w[mi mile miles]
 end
 
-RubyUnits::Unit.define('naut-mile') do |naut|
-  naut.definition = RubyUnits::Unit.new('1852 m')
+RubyUnits::Unit.define("naut-mile") do |naut|
+  naut.definition = RubyUnits::Unit.new("1852 m")
   naut.aliases    = %w[nmi NM]
   # Don't use the 'M' abbreviation here since it conflicts with 'Molar'
 end
 
 # on land
-RubyUnits::Unit.define('league') do |league|
-  league.definition = RubyUnits::Unit.new('3 miles')
+RubyUnits::Unit.define("league") do |league|
+  league.definition = RubyUnits::Unit.new("3 miles")
   league.aliases    = %w[league leagues]
 end
 
 # at sea
-RubyUnits::Unit.define('naut-league') do |naut_league|
-  naut_league.definition = RubyUnits::Unit.new('3 nmi')
+RubyUnits::Unit.define("naut-league") do |naut_league|
+  naut_league.definition = RubyUnits::Unit.new("3 nmi")
   naut_league.aliases    = %w[nleague nleagues]
 end
 
-RubyUnits::Unit.define('furlong') do |furlong|
-  furlong.definition = RubyUnits::Unit.new('1/8 mile')
+RubyUnits::Unit.define("furlong") do |furlong|
+  furlong.definition = RubyUnits::Unit.new("1/8 mile")
   furlong.aliases    = %w[fur furlong furlongs]
 end
 
-RubyUnits::Unit.define('rod') do |rod|
-  rod.definition  = RubyUnits::Unit.new('33/2 feet')
+RubyUnits::Unit.define("rod") do |rod|
+  rod.definition  = RubyUnits::Unit.new("33/2 feet")
   rod.aliases     = %w[rd rod rods]
 end
 
-RubyUnits::Unit.define('fathom') do |fathom|
-  fathom.definition = RubyUnits::Unit.new('6 ft')
+RubyUnits::Unit.define("fathom") do |fathom|
+  fathom.definition = RubyUnits::Unit.new("6 ft")
   fathom.aliases    = %w[fathom fathoms]
 end
 
-RubyUnits::Unit.define('mil') do |mil|
-  mil.definition = RubyUnits::Unit.new('1/1000 inch')
+RubyUnits::Unit.define("mil") do |mil|
+  mil.definition = RubyUnits::Unit.new("1/1000 inch")
   mil.aliases    = %w[mil mils]
 end
 
-RubyUnits::Unit.define('angstrom') do |ang|
-  ang.definition = RubyUnits::Unit.new('1/10 nm')
+RubyUnits::Unit.define("angstrom") do |ang|
+  ang.definition = RubyUnits::Unit.new("1/10 nm")
   ang.aliases    = %w[ang angstrom angstroms]
 end
 
 # typesetting
 
-RubyUnits::Unit.define('pica') do |pica|
-  pica.definition = RubyUnits::Unit.new('1/72 ft')
+RubyUnits::Unit.define("pica") do |pica|
+  pica.definition = RubyUnits::Unit.new("1/72 ft")
   pica.aliases    = %w[pica picas]
   # Don't use 'P' as an abbreviation since it conflicts with 'Poise'
   # Don't use 'pc' as an abbreviation since it conflicts with 'parsec'
 end
 
-RubyUnits::Unit.define('point') do |point|
-  point.definition = RubyUnits::Unit.new('1/12 pica')
+RubyUnits::Unit.define("point") do |point|
+  point.definition = RubyUnits::Unit.new("1/12 pica")
   point.aliases    = %w[point points]
 end
 
-RubyUnits::Unit.define('dot') do |dot|
-  dot.definition  = RubyUnits::Unit.new('1 each')
+RubyUnits::Unit.define("dot") do |dot|
+  dot.definition  = RubyUnits::Unit.new("1 each")
   dot.aliases     = %w[dot dots]
   dot.kind        = :counting
 end
 
-RubyUnits::Unit.define('pixel') do |pixel|
-  pixel.definition  = RubyUnits::Unit.new('1 each')
+RubyUnits::Unit.define("pixel") do |pixel|
+  pixel.definition  = RubyUnits::Unit.new("1 each")
   pixel.aliases     = %w[px pixel pixels]
   pixel.kind        = :counting
 end
 
-RubyUnits::Unit.define('ppi') do |ppi|
-  ppi.definition  = RubyUnits::Unit.new('1 pixel/inch')
+RubyUnits::Unit.define("ppi") do |ppi|
+  ppi.definition  = RubyUnits::Unit.new("1 pixel/inch")
 end
 
-RubyUnits::Unit.define('dpi') do |dpi|
-  dpi.definition  = RubyUnits::Unit.new('1 dot/inch')
+RubyUnits::Unit.define("dpi") do |dpi|
+  dpi.definition  = RubyUnits::Unit.new("1 dot/inch")
 end
 
 # Mass
 
-avagadro_constant = RubyUnits::Unit.new('6.02214129e23 1/mol')
+avagadro_constant = RubyUnits::Unit.new("6.02214129e23 1/mol")
 
-RubyUnits::Unit.define('AMU') do |amu|
-  amu.definition = RubyUnits::Unit.new('0.012 kg/mol') / (12 * avagadro_constant)
+RubyUnits::Unit.define("AMU") do |amu|
+  amu.definition = RubyUnits::Unit.new("0.012 kg/mol") / (12 * avagadro_constant)
   amu.aliases    = %w[u AMU amu]
 end
 
-RubyUnits::Unit.define('dalton') do |dalton|
-  dalton.definition = RubyUnits::Unit.new('1 amu')
+RubyUnits::Unit.define("dalton") do |dalton|
+  dalton.definition = RubyUnits::Unit.new("1 amu")
   dalton.aliases    = %w[Da dalton daltons]
 end
 
-RubyUnits::Unit.define('metric-ton') do |mton|
-  mton.definition = RubyUnits::Unit.new('1000 kg')
+RubyUnits::Unit.define("metric-ton") do |mton|
+  mton.definition = RubyUnits::Unit.new("1000 kg")
   mton.aliases    = %w[tonne]
 end
 
 # defined as a rational number to preserve accuracy and minimize round-off errors during
 # calculations
-RubyUnits::Unit.define('pound') do |pound|
-  pound.definition = RubyUnits::Unit.new(Rational(45_359_237, 1e8), 'kg')
+RubyUnits::Unit.define("pound") do |pound|
+  pound.definition = RubyUnits::Unit.new(Rational(45_359_237, 1e8), "kg")
   pound.aliases    = %w[lbs lb lbm pound-mass pound pounds #]
 end
 
-RubyUnits::Unit.define('ounce') do |ounce|
-  ounce.definition = RubyUnits::Unit.new('1/16 lbs')
+RubyUnits::Unit.define("ounce") do |ounce|
+  ounce.definition = RubyUnits::Unit.new("1/16 lbs")
   ounce.aliases    = %w[oz ounce ounces]
 end
 
-RubyUnits::Unit.define('gram') do |gram|
-  gram.definition = RubyUnits::Unit.new('1/1000 kg')
+RubyUnits::Unit.define("gram") do |gram|
+  gram.definition = RubyUnits::Unit.new("1/1000 kg")
   gram.aliases    = %w[g gram grams gramme grammes]
 end
 
-RubyUnits::Unit.define('short-ton') do |ton|
-  ton.definition = RubyUnits::Unit.new('2000 lbs')
+RubyUnits::Unit.define("short-ton") do |ton|
+  ton.definition = RubyUnits::Unit.new("2000 lbs")
   ton.aliases    = %w[tn ton tons short-tons]
 end
 
-RubyUnits::Unit.define('carat') do |carat|
-  carat.definition = RubyUnits::Unit.new('1/5000 kg')
+RubyUnits::Unit.define("carat") do |carat|
+  carat.definition = RubyUnits::Unit.new("1/5000 kg")
   carat.aliases    = %w[ct carat carats]
 end
 
-RubyUnits::Unit.define('stone') do |stone|
-  stone.definition = RubyUnits::Unit.new('14 lbs')
+RubyUnits::Unit.define("stone") do |stone|
+  stone.definition = RubyUnits::Unit.new("14 lbs")
   stone.aliases    = %w[st stone]
 end
 
 # time
 
-RubyUnits::Unit.define('minute') do |min|
-  min.definition = RubyUnits::Unit.new('60 seconds')
+RubyUnits::Unit.define("minute") do |min|
+  min.definition = RubyUnits::Unit.new("60 seconds")
   min.aliases    = %w[min minute minutes]
 end
 
-RubyUnits::Unit.define('hour') do |hour|
-  hour.definition = RubyUnits::Unit.new('60 minutes')
+RubyUnits::Unit.define("hour") do |hour|
+  hour.definition = RubyUnits::Unit.new("60 minutes")
   hour.aliases    = %w[h hr hrs hour hours]
 end
 
-RubyUnits::Unit.define('day') do |day|
-  day.definition  = RubyUnits::Unit.new('24 hours')
+RubyUnits::Unit.define("day") do |day|
+  day.definition  = RubyUnits::Unit.new("24 hours")
   day.aliases     = %w[d day days]
 end
 
-RubyUnits::Unit.define('week') do |week|
-  week.definition   = RubyUnits::Unit.new('7 days')
+RubyUnits::Unit.define("week") do |week|
+  week.definition   = RubyUnits::Unit.new("7 days")
   week.aliases      = %w[wk week weeks]
 end
 
-RubyUnits::Unit.define('fortnight') do |fortnight|
-  fortnight.definition  = RubyUnits::Unit.new('2 weeks')
+RubyUnits::Unit.define("fortnight") do |fortnight|
+  fortnight.definition  = RubyUnits::Unit.new("2 weeks")
   fortnight.aliases     = %w[fortnight fortnights]
 end
 
-RubyUnits::Unit.define('year') do |year|
-  year.definition = RubyUnits::Unit.new('31556926 seconds') # works out to 365.24219907407405 days
+RubyUnits::Unit.define("year") do |year|
+  year.definition = RubyUnits::Unit.new("31556926 seconds") # works out to 365.24219907407405 days
   year.aliases    = %w[y yr year years annum]
 end
 
-RubyUnits::Unit.define('decade') do |decade|
-  decade.definition = RubyUnits::Unit.new('10 years')
+RubyUnits::Unit.define("decade") do |decade|
+  decade.definition = RubyUnits::Unit.new("10 years")
   decade.aliases    = %w[decade decades]
 end
 
-RubyUnits::Unit.define('century') do |century|
-  century.definition  = RubyUnits::Unit.new('100 years')
+RubyUnits::Unit.define("century") do |century|
+  century.definition  = RubyUnits::Unit.new("100 years")
   century.aliases     = %w[century centuries]
 end
 
 # area
 
-RubyUnits::Unit.define('hectare') do |hectare|
-  hectare.definition = RubyUnits::Unit.new('10000 m^2')
+RubyUnits::Unit.define("hectare") do |hectare|
+  hectare.definition = RubyUnits::Unit.new("10000 m^2")
 end
 
-RubyUnits::Unit.define('acre') do |acre|
-  acre.definition = RubyUnits::Unit.new('1 mi')**2 / 640
+RubyUnits::Unit.define("acre") do |acre|
+  acre.definition = (RubyUnits::Unit.new("1 mi")**2) / 640
   acre.aliases    = %w[acre acres]
 end
 
-RubyUnits::Unit.define('sqft') do |sqft|
-  sqft.definition = RubyUnits::Unit.new('1 ft^2')
+RubyUnits::Unit.define("sqft") do |sqft|
+  sqft.definition = RubyUnits::Unit.new("1 ft^2")
 end
 
-RubyUnits::Unit.define('sqin') do |sqin|
-  sqin.definition = RubyUnits::Unit.new('1 in^2')
+RubyUnits::Unit.define("sqin") do |sqin|
+  sqin.definition = RubyUnits::Unit.new("1 in^2")
 end
 
 # volume
 
-RubyUnits::Unit.define('liter') do |liter|
-  liter.definition = RubyUnits::Unit.new('1/1000 m^3')
+RubyUnits::Unit.define("liter") do |liter|
+  liter.definition = RubyUnits::Unit.new("1/1000 m^3")
   liter.aliases    = %w[l L liter liters litre litres]
 end
 
-RubyUnits::Unit.define('gallon') do |gallon|
-  gallon.definition = RubyUnits::Unit.new('231 in^3')
+RubyUnits::Unit.define("gallon") do |gallon|
+  gallon.definition = RubyUnits::Unit.new("231 in^3")
   gallon.aliases    = %w[gal gallon gallons]
 end
 
-RubyUnits::Unit.define('quart') do |quart|
-  quart.definition  = RubyUnits::Unit.new('1/4 gal')
+RubyUnits::Unit.define("quart") do |quart|
+  quart.definition  = RubyUnits::Unit.new("1/4 gal")
   quart.aliases     = %w[qt quart quarts]
 end
 
-RubyUnits::Unit.define('pint') do |pint|
-  pint.definition = RubyUnits::Unit.new('1/8 gal')
+RubyUnits::Unit.define("pint") do |pint|
+  pint.definition = RubyUnits::Unit.new("1/8 gal")
   pint.aliases    = %w[pt pint pints]
 end
 
-RubyUnits::Unit.define('cup') do |cup|
-  cup.definition = RubyUnits::Unit.new('1/16 gal')
+RubyUnits::Unit.define("cup") do |cup|
+  cup.definition = RubyUnits::Unit.new("1/16 gal")
   cup.aliases    = %w[cu cup cups]
 end
 
-RubyUnits::Unit.define('fluid-ounce') do |floz|
-  floz.definition = RubyUnits::Unit.new('1/128 gal')
+RubyUnits::Unit.define("fluid-ounce") do |floz|
+  floz.definition = RubyUnits::Unit.new("1/128 gal")
   floz.aliases    = %w[floz fluid-ounce fluid-ounces]
 end
 
-RubyUnits::Unit.define('tablespoon') do |tbsp|
-  tbsp.definition = RubyUnits::Unit.new('1/2 floz')
+RubyUnits::Unit.define("tablespoon") do |tbsp|
+  tbsp.definition = RubyUnits::Unit.new("1/2 floz")
   tbsp.aliases    = %w[tbs tbsp tablespoon tablespoons]
 end
 
-RubyUnits::Unit.define('teaspoon') do |tsp|
-  tsp.definition = RubyUnits::Unit.new('1/3 tablespoon')
+RubyUnits::Unit.define("teaspoon") do |tsp|
+  tsp.definition = RubyUnits::Unit.new("1/3 tablespoon")
   tsp.aliases    = %w[tsp teaspoon teaspoons]
 end
 
 ##
 # The board-foot is a specialized unit of measure for the volume of lumber in
 # the United States and Canada. It is the volume of a one-foot length of a board
 # one foot wide and one inch thick.
 # http://en.wikipedia.org/wiki/Board_foot
-RubyUnits::Unit.define('bdft') do |bdft|
-  bdft.definition = RubyUnits::Unit.new('1/12 ft^3')
+RubyUnits::Unit.define("bdft") do |bdft|
+  bdft.definition = RubyUnits::Unit.new("1/12 ft^3")
   bdft.aliases    = %w[fbm boardfoot boardfeet bf]
 end
 
 # volumetric flow
 
-RubyUnits::Unit.define('cfm') do |cfm|
-  cfm.definition = RubyUnits::Unit.new('1 ft^3/minute')
+RubyUnits::Unit.define("cfm") do |cfm|
+  cfm.definition = RubyUnits::Unit.new("1 ft^3/minute")
   cfm.aliases    = %w[cfm CFM CFPM]
 end
 
 # speed
 
-RubyUnits::Unit.define('kph') do |kph|
-  kph.definition  = RubyUnits::Unit.new('1 kilometer/hour')
+RubyUnits::Unit.define("kph") do |kph|
+  kph.definition  = RubyUnits::Unit.new("1 kilometer/hour")
 end
 
-RubyUnits::Unit.define('mph') do |mph|
-  mph.definition  = RubyUnits::Unit.new('1 mile/hour')
+RubyUnits::Unit.define("mph") do |mph|
+  mph.definition  = RubyUnits::Unit.new("1 mile/hour")
 end
 
-RubyUnits::Unit.define('fps') do |fps|
-  fps.definition  = RubyUnits::Unit.new('1 foot/second')
+RubyUnits::Unit.define("fps") do |fps|
+  fps.definition  = RubyUnits::Unit.new("1 foot/second")
 end
 
-RubyUnits::Unit.define('knot') do |knot|
-  knot.definition   = RubyUnits::Unit.new('1 nmi/hour')
+RubyUnits::Unit.define("knot") do |knot|
+  knot.definition   = RubyUnits::Unit.new("1 nmi/hour")
   knot.aliases      = %w[kt kn kts knot knots]
 end
 
-RubyUnits::Unit.define('gee') do |gee|
+RubyUnits::Unit.define("gee") do |gee|
   # approximated as a rational number to minimize round-off errors
-  gee.definition    = RubyUnits::Unit.new(Rational(196_133, 20_000), 'm/s^2') # equivalent to 9.80665 m/s^2
+  gee.definition    = RubyUnits::Unit.new(Rational(196_133, 20_000), "m/s^2") # equivalent to 9.80665 m/s^2
   gee.aliases       = %w[gee standard-gravitation]
 end
 
 # temperature differences
 
-RubyUnits::Unit.define('newton') do |newton|
-  newton.definition = RubyUnits::Unit.new('1 kg*m/s^2')
+RubyUnits::Unit.define("newton") do |newton|
+  newton.definition = RubyUnits::Unit.new("1 kg*m/s^2")
   newton.aliases    = %w[N newton newtons]
 end
 
-RubyUnits::Unit.define('dyne') do |dyne|
-  dyne.definition = RubyUnits::Unit.new('1/100000 N')
+RubyUnits::Unit.define("dyne") do |dyne|
+  dyne.definition = RubyUnits::Unit.new("1/100000 N")
   dyne.aliases    = %w[dyn dyne]
 end
 
-RubyUnits::Unit.define('pound-force') do |lbf|
-  lbf.definition  = RubyUnits::Unit.new('1 lb') * RubyUnits::Unit.new('1 gee')
+RubyUnits::Unit.define("pound-force") do |lbf|
+  lbf.definition  = RubyUnits::Unit.new("1 lb") * RubyUnits::Unit.new("1 gee")
   lbf.aliases     = %w[lbf pound-force]
 end
 
-RubyUnits::Unit.define('poundal') do |poundal|
-  poundal.definition  = RubyUnits::Unit.new('1 lb') * RubyUnits::Unit.new('1 ft/s^2')
+RubyUnits::Unit.define("poundal") do |poundal|
+  poundal.definition  = RubyUnits::Unit.new("1 lb") * RubyUnits::Unit.new("1 ft/s^2")
   poundal.aliases     = %w[pdl poundal poundals]
 end
 
 temp_convert_factor = Rational(2_501_999_792_983_609, 4_503_599_627_370_496) # approximates 1/1.8
 
-RubyUnits::Unit.define('celsius') do |celsius|
-  celsius.definition  = RubyUnits::Unit.new('1 degK')
+RubyUnits::Unit.define("celsius") do |celsius|
+  celsius.definition  = RubyUnits::Unit.new("1 degK")
   celsius.aliases     = %w[degC celsius centigrade]
 end
 
-RubyUnits::Unit.define('fahrenheit') do |fahrenheit|
-  fahrenheit.definition = RubyUnits::Unit.new(temp_convert_factor, 'degK')
+RubyUnits::Unit.define("fahrenheit") do |fahrenheit|
+  fahrenheit.definition = RubyUnits::Unit.new(temp_convert_factor, "degK")
   fahrenheit.aliases    = %w[degF fahrenheit]
 end
 
-RubyUnits::Unit.define('rankine') do |rankine|
-  rankine.definition  = RubyUnits::Unit.new('1 degF')
+RubyUnits::Unit.define("rankine") do |rankine|
+  rankine.definition  = RubyUnits::Unit.new("1 degF")
   rankine.aliases     = %w[degR rankine]
 end
 
-RubyUnits::Unit.define('tempC') do |temp_c|
-  temp_c.definition  = RubyUnits::Unit.new('1 tempK')
+RubyUnits::Unit.define("tempC") do |temp_c|
+  temp_c.definition  = RubyUnits::Unit.new("1 tempK")
 end
 
-RubyUnits::Unit.define('tempF') do |temp_f|
-  temp_f.definition  = RubyUnits::Unit.new(temp_convert_factor, 'tempK')
+RubyUnits::Unit.define("tempF") do |temp_f|
+  temp_f.definition  = RubyUnits::Unit.new(temp_convert_factor, "tempK")
 end
 
-RubyUnits::Unit.define('tempR') do |temp_r|
-  temp_r.definition  = RubyUnits::Unit.new('1 tempF')
+RubyUnits::Unit.define("tempR") do |temp_r|
+  temp_r.definition  = RubyUnits::Unit.new("1 tempF")
 end
 
 # astronomy
 
-speed_of_light = RubyUnits::Unit.new('299792458 m/s')
+speed_of_light = RubyUnits::Unit.new("299792458 m/s")
 
-RubyUnits::Unit.define('light-second') do |ls|
-  ls.definition = RubyUnits::Unit.new('1 s') * speed_of_light
+RubyUnits::Unit.define("light-second") do |ls|
+  ls.definition = RubyUnits::Unit.new("1 s") * speed_of_light
   ls.aliases    = %w[ls lsec light-second]
 end
 
-RubyUnits::Unit.define('light-minute') do |lmin|
-  lmin.definition = RubyUnits::Unit.new('1 min') * speed_of_light
+RubyUnits::Unit.define("light-minute") do |lmin|
+  lmin.definition = RubyUnits::Unit.new("1 min") * speed_of_light
   lmin.aliases    = %w[lmin light-minute]
 end
 
-RubyUnits::Unit.define('light-year') do |ly|
-  ly.definition = RubyUnits::Unit.new('1 y') * speed_of_light
+RubyUnits::Unit.define("light-year") do |ly|
+  ly.definition = RubyUnits::Unit.new("1 y") * speed_of_light
   ly.aliases    = %w[ly light-year]
 end
 
-RubyUnits::Unit.define('parsec') do |parsec|
-  parsec.definition = RubyUnits::Unit.new('3.26163626 ly')
+RubyUnits::Unit.define("parsec") do |parsec|
+  parsec.definition = RubyUnits::Unit.new("3.26163626 ly")
   parsec.aliases    = %w[pc parsec parsecs]
 end
 
 # once was '149597900000 m' but there appears to be a more accurate estimate according to wikipedia
 # see http://en.wikipedia.org/wiki/Astronomical_unit
-RubyUnits::Unit.define('AU') do |au|
-  au.definition = RubyUnits::Unit.new('149597870700 m')
+RubyUnits::Unit.define("AU") do |au|
+  au.definition = RubyUnits::Unit.new("149597870700 m")
   au.aliases    = %w[AU astronomical-unit]
 end
 
-RubyUnits::Unit.define('redshift') do |red|
-  red.definition = RubyUnits::Unit.new('1.302773e26 m')
+RubyUnits::Unit.define("redshift") do |red|
+  red.definition = RubyUnits::Unit.new("1.302773e26 m")
   red.aliases    = %w[z red-shift]
 end
 
 # mass
 
-RubyUnits::Unit.define('slug') do |slug|
-  slug.definition = RubyUnits::Unit.new('1 lbf*s^2/ft')
+RubyUnits::Unit.define("slug") do |slug|
+  slug.definition = RubyUnits::Unit.new("1 lbf*s^2/ft")
   slug.aliases    = %w[slug slugs]
 end
 
 # pressure
 
-RubyUnits::Unit.define('pascal') do |pascal|
-  pascal.definition = RubyUnits::Unit.new('1 kg/m*s^2')
+RubyUnits::Unit.define("pascal") do |pascal|
+  pascal.definition = RubyUnits::Unit.new("1 kg/m*s^2")
   pascal.aliases    = %w[Pa pascal pascals]
 end
 
-RubyUnits::Unit.define('bar') do |bar|
-  bar.definition  = RubyUnits::Unit.new('100 kPa')
+RubyUnits::Unit.define("bar") do |bar|
+  bar.definition  = RubyUnits::Unit.new("100 kPa")
   bar.aliases     = %w[bar bars]
 end
 
-RubyUnits::Unit.define('atm') do |atm|
-  atm.definition  = RubyUnits::Unit.new('101325 Pa')
+RubyUnits::Unit.define("atm") do |atm|
+  atm.definition  = RubyUnits::Unit.new("101325 Pa")
   atm.aliases     = %w[atm ATM atmosphere atmospheres]
 end
 
-RubyUnits::Unit.define('mmHg') do |mmhg|
-  density_of_mercury  = RubyUnits::Unit.new('7653360911758079/562949953421312 g/cm^3') # 13.5951 g/cm^3 at 0 tempC
-  mmhg.definition     = RubyUnits::Unit.new('1 mm') * RubyUnits::Unit.new('1 gee') * density_of_mercury
+RubyUnits::Unit.define("mmHg") do |mmhg|
+  density_of_mercury  = RubyUnits::Unit.new("7653360911758079/562949953421312 g/cm^3") # 13.5951 g/cm^3 at 0 tempC
+  mmhg.definition     = RubyUnits::Unit.new("1 mm") * RubyUnits::Unit.new("1 gee") * density_of_mercury
 end
 
-RubyUnits::Unit.define('inHg') do |inhg|
-  density_of_mercury = RubyUnits::Unit.new('7653360911758079/562949953421312 g/cm^3') # 13.5951 g/cm^3 at 0 tempC
-  inhg.definition    = RubyUnits::Unit.new('1 in') * RubyUnits::Unit.new('1 gee') * density_of_mercury
+RubyUnits::Unit.define("inHg") do |inhg|
+  density_of_mercury = RubyUnits::Unit.new("7653360911758079/562949953421312 g/cm^3") # 13.5951 g/cm^3 at 0 tempC
+  inhg.definition    = RubyUnits::Unit.new("1 in") * RubyUnits::Unit.new("1 gee") * density_of_mercury
 end
 
-RubyUnits::Unit.define('torr') do |torr|
-  torr.definition = RubyUnits::Unit.new('1/760 atm')
+RubyUnits::Unit.define("torr") do |torr|
+  torr.definition = RubyUnits::Unit.new("1/760 atm")
   torr.aliases    = %w[Torr torr]
 end
 
-RubyUnits::Unit.define('psi') do |psi|
-  psi.definition  = RubyUnits::Unit.new('1 lbf/in^2')
+RubyUnits::Unit.define("psi") do |psi|
+  psi.definition  = RubyUnits::Unit.new("1 lbf/in^2")
 end
 
-RubyUnits::Unit.define('cmh2o') do |cmh2o|
-  density_of_water  = RubyUnits::Unit.new('1 g/cm^3') # at 4 tempC
-  cmh2o.definition  = RubyUnits::Unit.new('1 cm') * RubyUnits::Unit.new('1 gee') * density_of_water
+RubyUnits::Unit.define("cmh2o") do |cmh2o|
+  density_of_water  = RubyUnits::Unit.new("1 g/cm^3") # at 4 tempC
+  cmh2o.definition  = RubyUnits::Unit.new("1 cm") * RubyUnits::Unit.new("1 gee") * density_of_water
   cmh2o.aliases     = %w[cmH2O cmh2o cmAq]
 end
 
-RubyUnits::Unit.define('inh2o') do |inh2o|
-  density_of_water  = RubyUnits::Unit.new('1 g/cm^3') # at 4 tempC
-  inh2o.definition  = RubyUnits::Unit.new('1 in') * RubyUnits::Unit.new('1 gee') * density_of_water
+RubyUnits::Unit.define("inh2o") do |inh2o|
+  density_of_water  = RubyUnits::Unit.new("1 g/cm^3") # at 4 tempC
+  inh2o.definition  = RubyUnits::Unit.new("1 in") * RubyUnits::Unit.new("1 gee") * density_of_water
   inh2o.aliases     = %w[inH2O inh2o inAq]
 end
 
 # viscosity
 
-RubyUnits::Unit.define('poise') do |poise|
-  poise.definition  = RubyUnits::Unit.new('dPa*s')
+RubyUnits::Unit.define("poise") do |poise|
+  poise.definition  = RubyUnits::Unit.new("dPa*s")
   poise.aliases     = %w[P poise]
 end
 
-RubyUnits::Unit.define('stokes') do |stokes|
-  stokes.definition = RubyUnits::Unit.new('1 cm^2/s')
+RubyUnits::Unit.define("stokes") do |stokes|
+  stokes.definition = RubyUnits::Unit.new("1 cm^2/s")
   stokes.aliases    = %w[St stokes]
 end
 
 # #energy
 
-RubyUnits::Unit.define('joule') do |joule|
-  joule.definition  = RubyUnits::Unit.new('1 N*m')
+RubyUnits::Unit.define("joule") do |joule|
+  joule.definition  = RubyUnits::Unit.new("1 N*m")
   joule.aliases     = %w[J joule joules]
 end
 
-RubyUnits::Unit.define('erg') do |erg|
-  erg.definition  = RubyUnits::Unit.new('1 g*cm^2/s^2')
+RubyUnits::Unit.define("erg") do |erg|
+  erg.definition  = RubyUnits::Unit.new("1 g*cm^2/s^2")
   erg.aliases     = %w[erg ergs]
 end
 
 # power
 
-RubyUnits::Unit.define('watt') do |watt|
-  watt.definition = RubyUnits::Unit.new('1 N*m/s')
+RubyUnits::Unit.define("watt") do |watt|
+  watt.definition = RubyUnits::Unit.new("1 N*m/s")
   watt.aliases    = %w[W Watt watt watts]
 end
 
-RubyUnits::Unit.define('horsepower') do |hp|
-  hp.definition = RubyUnits::Unit.new('33000 ft*lbf/min')
+RubyUnits::Unit.define("horsepower") do |hp|
+  hp.definition = RubyUnits::Unit.new("33000 ft*lbf/min")
   hp.aliases    = %w[hp horsepower]
 end
 
 # energy
-RubyUnits::Unit.define('btu') do |btu|
-  btu.definition  = RubyUnits::Unit.new('2320092679909671/2199023255552 J') # 1055.056 J  --- ISO standard
+RubyUnits::Unit.define("btu") do |btu|
+  btu.definition  = RubyUnits::Unit.new("2320092679909671/2199023255552 J") # 1055.056 J  --- ISO standard
   btu.aliases     = %w[Btu btu Btus btus]
 end
 
-RubyUnits::Unit.define('therm') do |therm|
-  therm.definition  = RubyUnits::Unit.new('100 kBtu')
+RubyUnits::Unit.define("therm") do |therm|
+  therm.definition  = RubyUnits::Unit.new("100 kBtu")
   therm.aliases     = %w[thm therm therms Therm]
 end
 
 # "small" calorie
-RubyUnits::Unit.define('calorie') do |calorie|
-  calorie.definition  = RubyUnits::Unit.new('4.184 J')
+RubyUnits::Unit.define("calorie") do |calorie|
+  calorie.definition  = RubyUnits::Unit.new("4.184 J")
   calorie.aliases     = %w[cal calorie calories]
 end
 
 # "big" calorie
-RubyUnits::Unit.define('Calorie') do |calorie|
-  calorie.definition  = RubyUnits::Unit.new('1 kcal')
+RubyUnits::Unit.define("Calorie") do |calorie|
+  calorie.definition  = RubyUnits::Unit.new("1 kcal")
   calorie.aliases     = %w[Cal Calorie Calories]
 end
 
-RubyUnits::Unit.define('molar') do |molar|
-  molar.definition  = RubyUnits::Unit.new('1 mole/l')
+RubyUnits::Unit.define("molar") do |molar|
+  molar.definition  = RubyUnits::Unit.new("1 mole/l")
   molar.aliases     = %w[M molar]
 end
 
 # potential
-RubyUnits::Unit.define('volt') do |volt|
-  volt.definition = RubyUnits::Unit.new('1 W/A')
+RubyUnits::Unit.define("volt") do |volt|
+  volt.definition = RubyUnits::Unit.new("1 W/A")
   volt.aliases    = %w[V volt volts]
 end
 
 # capacitance
-RubyUnits::Unit.define('farad') do |farad|
-  farad.definition  = RubyUnits::Unit.new('1 A*s/V')
+RubyUnits::Unit.define("farad") do |farad|
+  farad.definition  = RubyUnits::Unit.new("1 A*s/V")
   farad.aliases     = %w[F farad farads]
 end
 
 # charge
-RubyUnits::Unit.define('coulomb') do |coulomb|
-  coulomb.definition  = RubyUnits::Unit.new('1 A*s')
+RubyUnits::Unit.define("coulomb") do |coulomb|
+  coulomb.definition  = RubyUnits::Unit.new("1 A*s")
   coulomb.aliases     = %w[C coulomb coulombs]
 end
 
 # conductance
-RubyUnits::Unit.define('siemens') do |siemens|
-  siemens.definition  = RubyUnits::Unit.new('1 A/V')
+RubyUnits::Unit.define("siemens") do |siemens|
+  siemens.definition  = RubyUnits::Unit.new("1 A/V")
   siemens.aliases     = %w[S siemens]
 end
 
 # inductance
-RubyUnits::Unit.define('henry') do |henry|
-  henry.definition  = RubyUnits::Unit.new('1 J/A^2')
+RubyUnits::Unit.define("henry") do |henry|
+  henry.definition  = RubyUnits::Unit.new("1 J/A^2")
   henry.aliases     = %w[H henry henries]
 end
 
 # resistance
-RubyUnits::Unit.define('ohm') do |ohm|
-  ohm.definition  = RubyUnits::Unit.new('1 V/A')
+RubyUnits::Unit.define("ohm") do |ohm|
+  ohm.definition  = RubyUnits::Unit.new("1 V/A")
   ohm.aliases     = %w[Ohm ohm ohms]
 end
 
 # magnetism
 
-RubyUnits::Unit.define('weber') do |weber|
-  weber.definition  = RubyUnits::Unit.new('1 V*s')
+RubyUnits::Unit.define("weber") do |weber|
+  weber.definition  = RubyUnits::Unit.new("1 V*s")
   weber.aliases     = %w[Wb weber webers]
 end
 
-RubyUnits::Unit.define('tesla') do |tesla|
-  tesla.definition  = RubyUnits::Unit.new('1 V*s/m^2')
+RubyUnits::Unit.define("tesla") do |tesla|
+  tesla.definition  = RubyUnits::Unit.new("1 V*s/m^2")
   tesla.aliases     = %w[T tesla teslas]
 end
 
-RubyUnits::Unit.define('gauss') do |gauss|
-  gauss.definition  = RubyUnits::Unit.new('100 microT')
+RubyUnits::Unit.define("gauss") do |gauss|
+  gauss.definition  = RubyUnits::Unit.new("100 microT")
   gauss.aliases     = %w[G gauss]
 end
 
-RubyUnits::Unit.define('maxwell') do |maxwell|
-  maxwell.definition  = RubyUnits::Unit.new('1 gauss*cm^2')
+RubyUnits::Unit.define("maxwell") do |maxwell|
+  maxwell.definition  = RubyUnits::Unit.new("1 gauss*cm^2")
   maxwell.aliases     = %w[Mx maxwell maxwells]
 end
 
-RubyUnits::Unit.define('oersted') do |oersted|
-  oersted.definition  = RubyUnits::Unit.new(250.0 / Math::PI, 'A/m')
+RubyUnits::Unit.define("oersted") do |oersted|
+  oersted.definition  = RubyUnits::Unit.new(250.0 / Math::PI, "A/m")
   oersted.aliases     = %w[Oe oersted oersteds]
 end
 
 # activity
-RubyUnits::Unit.define('katal') do |katal|
-  katal.definition  = RubyUnits::Unit.new('1 mole/sec')
+RubyUnits::Unit.define("katal") do |katal|
+  katal.definition  = RubyUnits::Unit.new("1 mole/sec")
   katal.aliases     = %w[kat katal]
 end
 
-RubyUnits::Unit.define('unit') do |unit|
-  unit.definition   = RubyUnits::Unit.new('1/60 microkatal')
+RubyUnits::Unit.define("unit") do |unit|
+  unit.definition   = RubyUnits::Unit.new("1/60 microkatal")
   unit.aliases      = %w[U enzUnit units]
 end
 
 # frequency
 
-RubyUnits::Unit.define('hertz') do |hz|
-  hz.definition   = RubyUnits::Unit.new('1 1/s')
+RubyUnits::Unit.define("hertz") do |hz|
+  hz.definition   = RubyUnits::Unit.new("1 1/s")
   hz.aliases      = %w[Hz hertz]
 end
 
 # angle
-RubyUnits::Unit.define('degree') do |deg|
-  deg.definition    = RubyUnits::Unit.new(Math::PI / 180.0, 'radian')
+RubyUnits::Unit.define("degree") do |deg|
+  deg.definition    = RubyUnits::Unit.new(Math::PI / 180.0, "radian")
   deg.aliases       = %w[deg degree degrees]
 end
 
-RubyUnits::Unit.define('gon') do |grad|
-  grad.definition   = RubyUnits::Unit.new(Math::PI / 200.0, 'radian')
+RubyUnits::Unit.define("gon") do |grad|
+  grad.definition   = RubyUnits::Unit.new(Math::PI / 200.0, "radian")
   grad.aliases      = %w[gon grad gradian grads]
 end
 
 # rotation
-RubyUnits::Unit.define('rotation') do |rotation|
-  rotation.definition = RubyUnits::Unit.new(2.0 * Math::PI, 'radian')
+RubyUnits::Unit.define("rotation") do |rotation|
+  rotation.definition = RubyUnits::Unit.new(2.0 * Math::PI, "radian")
 end
 
-RubyUnits::Unit.define('rpm') do |rpm|
-  rpm.definition  = RubyUnits::Unit.new('1 rotation/min')
+RubyUnits::Unit.define("rpm") do |rpm|
+  rpm.definition  = RubyUnits::Unit.new("1 rotation/min")
 end
 
 # memory
-RubyUnits::Unit.define('bit') do |bit|
-  bit.definition  = RubyUnits::Unit.new('1/8 byte')
+RubyUnits::Unit.define("bit") do |bit|
+  bit.definition  = RubyUnits::Unit.new("1/8 byte")
   bit.aliases     = %w[b bit]
 end
 
 # currency
-RubyUnits::Unit.define('cents') do |cents|
-  cents.definition  = RubyUnits::Unit.new('1/100 dollar')
+RubyUnits::Unit.define("cents") do |cents|
+  cents.definition  = RubyUnits::Unit.new("1/100 dollar")
 end
 
 # luminosity
-RubyUnits::Unit.define('lumen') do |lumen|
-  lumen.definition  = RubyUnits::Unit.new('1 cd*steradian')
+RubyUnits::Unit.define("lumen") do |lumen|
+  lumen.definition  = RubyUnits::Unit.new("1 cd*steradian")
   lumen.aliases     = %w[lm lumen]
 end
 
-RubyUnits::Unit.define('lux') do |lux|
-  lux.definition  = RubyUnits::Unit.new('1 lumen/m^2')
+RubyUnits::Unit.define("lux") do |lux|
+  lux.definition  = RubyUnits::Unit.new("1 lumen/m^2")
 end
 
 # radiation
-RubyUnits::Unit.define('gray') do |gray|
-  gray.definition = RubyUnits::Unit.new('1 J/kg')
+RubyUnits::Unit.define("gray") do |gray|
+  gray.definition = RubyUnits::Unit.new("1 J/kg")
   gray.aliases    = %w[Gy gray grays]
 end
 
-RubyUnits::Unit.define('roentgen') do |roentgen|
-  roentgen.definition = RubyUnits::Unit.new('2.58e-4 C/kg')
+RubyUnits::Unit.define("roentgen") do |roentgen|
+  roentgen.definition = RubyUnits::Unit.new("2.58e-4 C/kg")
   roentgen.aliases    = %w[R roentgen]
 end
 
-RubyUnits::Unit.define('sievert') do |sievert|
-  sievert.definition  = RubyUnits::Unit.new('1 J/kg')
+RubyUnits::Unit.define("sievert") do |sievert|
+  sievert.definition  = RubyUnits::Unit.new("1 J/kg")
   sievert.aliases     = %w[Sv sievert sieverts]
 end
 
-RubyUnits::Unit.define('becquerel') do |becquerel|
-  becquerel.definition  = RubyUnits::Unit.new('1 1/s')
+RubyUnits::Unit.define("becquerel") do |becquerel|
+  becquerel.definition  = RubyUnits::Unit.new("1 1/s")
   becquerel.aliases     = %w[Bq becquerel becquerels]
 end
 
-RubyUnits::Unit.define('curie') do |curie|
-  curie.definition  = RubyUnits::Unit.new('37 GBq')
+RubyUnits::Unit.define("curie") do |curie|
+  curie.definition  = RubyUnits::Unit.new("37 GBq")
   curie.aliases     = %w[Ci curie curies]
 end
 
-RubyUnits::Unit.define('count') do |count|
-  count.definition  = RubyUnits::Unit.new('1 each')
+RubyUnits::Unit.define("count") do |count|
+  count.definition  = RubyUnits::Unit.new("1 each")
   count.kind        = :counting
 end
 
 # rate
-RubyUnits::Unit.define('cpm') do |cpm|
-  cpm.definition  = RubyUnits::Unit.new('1 count/min')
+RubyUnits::Unit.define("cpm") do |cpm|
+  cpm.definition  = RubyUnits::Unit.new("1 count/min")
 end
 
-RubyUnits::Unit.define('dpm') do |dpm|
-  dpm.definition  = RubyUnits::Unit.new('1 count/min')
+RubyUnits::Unit.define("dpm") do |dpm|
+  dpm.definition  = RubyUnits::Unit.new("1 count/min")
 end
 
-RubyUnits::Unit.define('bpm') do |bpm|
-  bpm.definition  = RubyUnits::Unit.new('1 count/min')
+RubyUnits::Unit.define("bpm") do |bpm|
+  bpm.definition  = RubyUnits::Unit.new("1 count/min")
 end
 
 # misc
-RubyUnits::Unit.define('dozen') do |dozen|
-  dozen.definition  = RubyUnits::Unit.new('12 each')
+RubyUnits::Unit.define("dozen") do |dozen|
+  dozen.definition  = RubyUnits::Unit.new("12 each")
   dozen.aliases     = %w[doz dz dozen]
   dozen.kind = :counting
 end
 
-RubyUnits::Unit.define('gross') do |gross|
-  gross.definition  = RubyUnits::Unit.new('12 dozen')
+RubyUnits::Unit.define("gross") do |gross|
+  gross.definition  = RubyUnits::Unit.new("12 dozen")
   gross.aliases     = %w[gr gross]
   gross.kind = :counting
 end
 
-RubyUnits::Unit.define('cell') do |cell|
-  cell.definition   = RubyUnits::Unit.new('1 each')
+RubyUnits::Unit.define("cell") do |cell|
+  cell.definition   = RubyUnits::Unit.new("1 each")
   cell.aliases      = %w[cells cell]
   cell.kind         = :counting
 end
 
-RubyUnits::Unit.define('base-pair') do |bp|
-  bp.definition   = RubyUnits::Unit.new('1 each')
+RubyUnits::Unit.define("base-pair") do |bp|
+  bp.definition   = RubyUnits::Unit.new("1 each")
   bp.aliases      = %w[bp base-pair]
   bp.kind         = :counting
 end
 
-RubyUnits::Unit.define('nucleotide') do |nt|
-  nt.definition   = RubyUnits::Unit.new('1 each')
+RubyUnits::Unit.define("nucleotide") do |nt|
+  nt.definition   = RubyUnits::Unit.new("1 each")
   nt.aliases      = %w[nt]
   nt.kind         = :counting
 end
 
-RubyUnits::Unit.define('molecule') do |molecule|
-  molecule.definition   = RubyUnits::Unit.new('1 each')
+RubyUnits::Unit.define("molecule") do |molecule|
+  molecule.definition   = RubyUnits::Unit.new("1 each")
   molecule.aliases      = %w[molecule molecules]
   molecule.kind         = :counting
 end
 
-RubyUnits::Unit.define('percent') do |percent|
-  percent.definition  = RubyUnits::Unit.new('1/100')
+RubyUnits::Unit.define("percent") do |percent|
+  percent.definition  = RubyUnits::Unit.new("1/100")
   percent.aliases     = %w[% percent]
 end
 
-RubyUnits::Unit.define('ppm') do |ppm|
+RubyUnits::Unit.define("ppm") do |ppm|
   ppm.definition  = RubyUnits::Unit.new(1) / 1_000_000
 end
 
-RubyUnits::Unit.define('ppb') do |ppb|
+RubyUnits::Unit.define("ppb") do |ppb|
   ppb.definition  = RubyUnits::Unit.new(1) / 1_000_000_000
 end