+repeats the group contents below at least once:
\na line-feed (newline) character (ASCII 10)
\1the text saved by group 1
\d{2}a digit, repeated exactly 2 times
\.the literal . (4610 / 568 / 2E16)
\d{3}a digit, repeated exactly 3 times
\2the text saved by group 2
\[the literal [ (9110 / 1338 / 5B16)
\d+a digit, repeated at least once
\]the literal ] (9310 / 1358 / 5D16)
\3the text saved by group 3
Negated Character Class[^\n]* *matches any number of characters outside the set below:
\na line-feed (newline) character (ASCII 10)