Ruby

ripper: fix %-op on_operator_ambiguous

• parse.y (ambiguous_operator): separate token and string
  representation of operators, to fix %-operator argument. in a
  warning message, needs to be escaped by '%' but the symbol
  should not be.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57606 b2dd03c8-39d4-4d8f-98ff-823fe69b080e