\[the literal [ (9110 / 1338 / 5B16)
.*?any Unicode character (except for line terminators), repeated any number of times
\]the literal ] (9310 / 1358 / 5D16)
\s*a Unicode whitespace character, repeated any number of times
\w+a Unicode word character, repeated at least once
:the literal : (5810 / 728 / 3A16)
\s*a Unicode whitespace character, repeated any number of times
.+any Unicode character (except for line terminators), repeated at least once
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