.*any character (except for line terminators), repeated any number of times
\ban ASCII word boundary
Non-Capturing Group(?:opt1|opt2|opt3) opt1the literal text opt1 (case sensitive) opt2the literal text opt2 (case sensitive) opt3the literal text opt3 (case sensitive) \ban ASCII word boundary
\s*any whitespace character, repeated any number of times
.*?any character (except for line terminators), repeated any number of times
\s*any whitespace character, repeated any number of times
because_of_thisthe literal text because_of_this (case sensitive) \ban ASCII word boundary
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