(?s)applies the following effective flags to the remainder of the pattern: gms s modifier: single line. Allows a dot to match line terminators
\Ra newline sequence
\Kresets the starting point of the reported match. Any previously consumed characters are no longer included in the final match
\[the literal [ (9110 / 1338 / 5B16)
\[the literal [ (9110 / 1338 / 5B16)
.*?any character, repeated any number of times
\R*a newline sequence, 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