lib/asciimath2unitsml/unit.rb in asciimath2unitsml-0.2.1 vs lib/asciimath2unitsml/unit.rb in asciimath2unitsml-0.2.2

@@ -5,10 +5,10 @@
     end
 
     def unit_id(text)
       text = text.gsub(/[()]/, "")
       /-$/.match(text) and return @prefixes[text.sub(/-$/, "")].id
-      "U_" + (@units[text] ? @units[text].id : text.gsub(/\*/, ".").gsub(/\^/, ""))
+      "U_" + (@units[text] ? @units[text].id.gsub(/'/, "_") : text.gsub(/\*/, ".").gsub(/\^/, ""))
     end
 
     def unit(units, origtext, normtext, dims, name)
       return if units_only(units).any? { |x| x[:unit].nil? }
       dimid = dim_id(dims)