#the literal # (3510 / 438 / 2316)
\d+a digit, repeated at least once
\s*any whitespace character, repeated any number of times
=the literal = (6110 / 758 / 3D16)
\s*any whitespace character, repeated any number of times
+matches at least one character from the set below:
a-zone character from a (9710) to z (12210) (case insensitive)
0-9one character from 0 (4810) to 9 (5710)
\s*any whitespace character, repeated any number of times
\(the literal ( (4010 / 508 / 2816)
Negated Character Class[^;]* *matches any number of characters outside the set below:
;the literal ; (5910 / 738 / 3B16)
\)the literal ) (4110 / 518 / 2916)
;the literal ; (5910 / 738 / 3B16)
g modifier: global. Finds all matches instead of stopping after the first
i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string