\[the literal [ (9110 / 1338 / 5B16)
begin-matchthe literal text begin-match (case sensitive) \]the literal ] (9310 / 1358 / 5D16)
Group 1((?:(?!\[end-match\]).)*) Non-Capturing Group(?:(?!\[end-match\]).)* *repeats the group contents below any number of times:
Negative Lookahead(?!\[end-match\]) \[the literal [ (9110 / 1338 / 5B16)
end-matchthe literal text end-match (case sensitive) \]the literal ] (9310 / 1358 / 5D16)
.any character (except for line terminators)
\[the literal [ (9110 / 1338 / 5B16)
end-matchthe literal text end-match (case sensitive) \]the literal ] (9310 / 1358 / 5D16)
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string