?repeats the group contents below at most once:
\sany whitespace character
-the literal - (4510 / 558 / 2D16)
\sany whitespace character
.*?any character (except for line terminators), repeated any number of times
-the literal - (4510 / 558 / 2D16)
Negated Character Class[^-\n]* *matches any number of characters outside the set below:
-the literal - (4510 / 558 / 2D16)
\na line-feed (newline) character (ASCII 10)
Non-Capturing Group(?:-.*)? ?repeats the group contents below at most once:
-the literal - (4510 / 558 / 2D16)
.*any character (except for line terminators), repeated any number of times