^start of line
#+the literal # (3510 / 438 / 2316) , repeated at least once
\s*any whitespace character, repeated any number of times
.*?any character (except for line terminators), repeated any number of times
\{the literal { (12310 / 1738 / 7B16)
#the literal # (3510 / 438 / 2316)
.*any character (except for line terminators), repeated any number of times
\}the literal } (12510 / 1758 / 7D16)
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