^start of line
Negated Character Class[^\s=]+ +matches at least one character outside the set below:
\sany whitespace character
=the literal = (6110 / 758 / 3D16)
\h+any horizontal whitespace character, repeated at least once
=the literal = (6110 / 758 / 3D16)
\h+any horizontal whitespace character, repeated at least once
Group 2(.*(?:\R(?![^\s=]+\h+=\h+).*)*) .*any character (except for line terminators), repeated any number of times
Non-Capturing Group(?:\R(?![^\s=]+\h+=\h+).*)* *repeats the group contents below any number of times:
\Ra newline sequence
Negative Lookahead(?![^\s=]+\h+=\h+) Negated Character Class[^\s=]+ +matches at least one character outside the set below:
\sany whitespace character
=the literal = (6110 / 758 / 3D16)
\h+any horizontal whitespace character, repeated at least once
=the literal = (6110 / 758 / 3D16)
\h+any horizontal whitespace character, repeated at least once
.*any character (except for line terminators), repeated any number of times
$end of line
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