Merge pull request #65 from jwillemsen/jwi-regeninstructions

Add instructions how to regenerate parser.rb

README.rdoc

@@ -46,3 +46,7 @@ The RIDL Gem is a Ruby-only Gem without any dependencies.
 == Releasing new RIDL Ruby Gem
 
 A new RIDL ruby gem release can be made by incrementing the RIDL version in link:lib/ridl/version.rb and create a new release on {github}[https://github.com/RemedyIT/ridl/releases] matching the new version (for example v2.7.0). The github {Ruby Gem Release}[https://github.com/RemedyIT/ridl/actions?query=workflow%3A%22Ruby+Gem+Release%22] action will automatically create a new gem and push it to {Rubygems.org}[https://www.rubygems.org/gems/ridl].
+
+== Regenerating `lib/racc/parser.rb`
+
+The file `lib/racc/parser.rb` can be regenerated using `racc -o parser.rb -E parser.ry`. The option `-E` embeds the racc parser within RIDL which is required for RIDL because jruby doesn't contain `RACC` as cruby does.