README.txt in ruby-units-0.3.8 vs README.txt in ruby-units-0.3.9

@@ -1,8 +1,8 @@
 =Ruby Units
 
-Version: 0.3.7
+Version: 0.3.9
 
 Kevin C. Olbrich, Ph.D. 
 [e-mail]
 
 http://www.sciwerks.com
@@ -80,9 +80,11 @@
  unit1 === unit2        # => true if units and quantity are the same, even if
                           'equivalent' by <=>
  unit.to('ft')          # convert
  unit1 + unit2 >> "ft"  # converts result of math to 'ft'
  (unit1 + unit2).to('ft') # converts result to 'ft'
+ 
+Any object that defines a 'to_unit' method will be automatically coerced to a unit during calculations.
  
 ==Text Output
 Units will display themselves nicely based on the preferred abbreviation for the units and prefixes.
 Since Unit implements a Unit#to_s, all that is needed in most cases is:
  "#{Unit.new('1 mm')}"  #=> "1 mm"