Emacs formatter should not output multiple lines for parse errors

[sds]

If you are running parser 2.2.0.4 or 2.2.2.0, running rubocop --format=emacs against the following results in a single error that spans multiple lines:

(/
   world # Some comment containing a )
/x)

~/src/test.rb:1:2: E: unmatched close parenthesis: /
   world # Some comment containing a )
/

I've filed whitequark/parser#190 with the parser gem for the parsing problem, but it seems like Rubocop shouldn't ever have error messages that span multiple lines when using --format=emacs? Or are my expectations not valid here?

[jonas054]

I think they are valid and that it wouldn't hurt to remove line breaks from Parser's diagnostic messages before outputting them, just in case there are any.