:nth-child(-/**/n+2) should parse

[Manishearth]

According to the spec, spaces are not allowed between +n and -n in nth-child, however it says nothing about comments. Chrome allows this, and with https://bugzilla.mozilla.org/show_bug.cgi?id=1364009, Firefox will too. We should as well.

cc @SimonSapin @dbaron

[SimonSapin]

+/**/n+2 matches '+'?† n <signed-integer>, but -/**/n+2 doesn’t match the grammar.

[emilio]

Still is what's accepted by other browsers, isn't it? Worth filing a spec issue I guess.

[SimonSapin]

shrugs
For once I think this is something that only ever happens in test cases.

[Manishearth]

Yeah, the comments don't matter as much.

Though gecko has an absurd number of tests for that 😄

[SimonSapin]

Closing in favor of w3c/csswg-drafts#1498.