*repeats the group contents below any number of times:
\r?optionally matches a carriage return (ASCII 13)
\na line-feed (newline) character (ASCII 10)
Negative Lookahead(?!(?:OPEN|START)$) Non-Capturing Group(?:OPEN|START) OPENthe literal text OPEN (case sensitive) STARTthe literal text START (case sensitive) $end of line
.*any character (except for line terminators), repeated any number of times