\$the literal $ (3610 / 448 / 2416)
Character Class[a-z0-9-]+ +matches at least one character from the set below:
a-zone character from a (9710) to z (12210) (case sensitive)
0-9one character from 0 (4810) to 9 (5710)
-the literal - (4510 / 558 / 2D16)
:the literal : (5810 / 728 / 3A16)
\s+any whitespace character, repeated at least once
Group 2(.[^;]{3,6}\s*(!default)?) .any character (except for line terminators)
Negated Character Class[^;]{3,6} {3,6}matches between 3 and 6 characters outside the set below:
;the literal ; (5910 / 738 / 3B16)
\s*any whitespace character, repeated any number of times
?repeats the group contents below at most once:
!defaultthe literal text !default (case sensitive) ;the literal ; (5910 / 738 / 3B16)
g modifier: global. Finds all matches instead of stopping after the first