+ Allow for 20 in parser class name.
[git-p4: depot-paths = "//src/ruby_parser/dev/": change = 9142]
minor cleanup
[git-p4: depot-paths = "//src/ruby_parser/dev/": change = 9143]
minor cleanup to normalize with rewrite
[git-p4: depot-paths = "//src/ruby_parser/dev/": change = 9144]