This fixes a bug when parsing the following rule-level and list-level
comments.
div {/*rtl:ignore*/left:10px;/*rtl:ignore*/ display:inline;}
/*rtl:ignore*/div {left:10px;} /*rtl:ignore*/ a {left:10px}
The latter rtl directive was being swallowed by the parser in these
cases and was not being properly allocated as a property of the rule
or csslist.
This restores the correct behaviour of the rtlcss library, which depends
on php-css-parser.
This version includes a fix[1] contributed by Frédéric Massart investigating
our compilation time issues, which significantly improves the speed of
processing font awesome.
Thanks, Fred!
[1] https://github.com/sabberworm/PHP-CSS-Parser/pull/120
