^start of line
\w+any word character, repeated at least once
:the literal : (5810 / 728 / 3A16)
\Kresets the starting point of the reported match. Any previously consumed characters are no longer included in the final match
\wany word character
.*any character (except for line terminators), repeated any number of times
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