[0-9]{1,2}:0-9\s[aApP]\.[mM]\.*

Library

BPKT-1;BPKR-2;BPRT-1^BPRK-2;MKRK-2

Capture groups fully cover captured characters with no overlaps, designed for any language with line comments or /, / style block comments. Validation is kept to a reasonable level to avoid high parsing time: Comment context is not validated with lookbehind Parenthesized author name block validat...