(?ms)applies the following effective flags to the remainder of the pattern: gms m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string
s modifier: single line. Allows a dot to match line terminators
\"the literal " (3410 / 428 / 2216)
tagthe literal text tag (case sensitive) \"the literal " (3410 / 428 / 2216)
:the literal : (5810 / 728 / 3A16)
\s*any whitespace character, repeated any number of times
Negated Character Class[^\n]+ +matches at least one character outside the set below:
\na line-feed (newline) character (ASCII 10)
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