lib/lrama/output.rb in lrama-0.5.4 vs lib/lrama/output.rb in lrama-0.5.5

@@ -250,10 +250,10 @@
         ""
       end
     end
 
     def extract_param_name(param)
-      /\A(\W*)([a-zA-Z0-9_]+)\z/.match(param.split.last)[2]
+      param[/\b([a-zA-Z0-9_]+)(?=\s*\z)/]
     end
 
     def parse_param_name
       if @grammar.parse_param
         extract_param_name(parse_param)