Fix mistyped pattern name in css syntax

[phynalle]

Description of the Change

Some parameters inside pseudo class dir haven't been colorized. It's trivial but it should be fixed.
The reason is the mistypo of pattern name and I just fixed it.

Alternate Designs

None

Benefits

We can see pattern colorizing inside dir pseudo class as intended.

Possible Drawbacks

None

Applicable Issues

None

[winstliu]

Thanks! Could you add some specs to this as well?

[phynalle]

What kind of spec do you need? I think the description is enough because I just corrected a mistypo.

[winstliu]

I mean specs as in tests: http://flight-manual.atom.io/hacking-atom/sections/writing-specs/
You add them to this file.

[phynalle]

I think specs should be remained.
I fixed ignoring some patterns which colorize parameter of :dir().
In current spec file, I think the specs about it are all written. So no additional spec is needed.
That is also the reason why the misspelling haven't been discovered.
Well, I can put any specs related to patterns I corrected but they wouldn't be allowed in css grammar.