\d+a digit, repeated at least once
\s+any whitespace character, repeated at least once
-the literal - (4510 / 558 / 2D16)
Non-Capturing Group(?:\s.*?(?=\s+-)|.+) 1st Alternative\s.*?(?=\s+-) \sany whitespace character
.*?any character (except for line terminators), repeated any number of times
Positive Lookahead(?=\s+-) \s+any whitespace character, repeated at least once
-the literal - (4510 / 558 / 2D16)
.+any character (except for line terminators), repeated at least once
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