\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*(?:\s(?!\s*-)\S*)*|.+) 1st Alternative\s+\S*(?:\s(?!\s*-)\S*)* \s+any whitespace character, repeated at least once
\S*any non-whitespace character, repeated any number of times
Non-Capturing Group(?:\s(?!\s*-)\S*)* *repeats the group contents below any number of times:
\sany whitespace character
Negative Lookahead(?!\s*-) \s*any whitespace character, repeated any number of times
-the literal - (4510 / 558 / 2D16)
\S*any non-whitespace character, repeated any number of times
.+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