This issue was solved with changeset r39504.
jy, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.
parse.y: keyword argument without paren
parse.y (IS_LABEL_POSSIBLE): allow labels for keyword arguments just
after method definition without a parenthesis. [ruby-core:52820]
[Bug #7942]
This issue was solved with changeset r39708.
jy, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.