Fix false positive for valid css with space-around-operator

[bgriffith]

This PR fixes a bug where valid css would:
1 - Be flagged up as requiring a space
2 - Cause a error with the parser.

The css in question is negative values for margin, top etc

margin: -15px;

Ps. Thanks to @DanPurdy for catching it!

Closes #394
DCO 1.1 Signed-off-by: Ben Griffith [email protected]

[DanPurdy]

How about variable/selector names, I know they're not targeted but in anticipation of gonzales changes that may affect this it would be good to have them in?

[bgriffith]

I don't feel that's necessary. Since we're only ever targeting ['condition', 'atruleb', 'value', 'atrulerq'] to begin with, selectors should never come up. I know you could potentially future proof it (somehow?!) but I can't see any reason why a character within a selector would ever be classed as an operator.

[DanPurdy]

'should' 😉

Update this and it's good to go

[DanPurdy]

grr update again and let me know.

[bgriffith]

I've clicked update. Now it's just waiting game.