Missing "ambiguous first argument"-warning

[judofyr]

See: https://github.com/rtomayko/tilt/blob/master/test/tilt_wikiclothtemplate_test.rb#L22

$ ruby -c -w test/tilt_wikiclothtemplate_test.rb
test/tilt_wikiclothtemplate_test.rb:22: warning: ambiguous first argument; put parentheses or even spaces
test/tilt_wikiclothtemplate_test.rb:27: warning: ambiguous first argument; put parentheses or even spaces
Syntax OK

ruby-parse -w doesn't give any warnings.

[whitequark]

I believe I either removed it because it's missing in 2.0 or HEAD, or it was just too much of a PITA to implement.

Warnings generally should be emitted by linters... however, Ruby's warnings are often (such as in this case) a replacement for nonexistent LALR error recovery. Pull requests are accepted (but first check if it's present in HEAD).

[whitequark]

Parser itself is not a linter.