This regex appears to mostly consist-of:   /^([A-Za-z0-9]+)\s*\)\s*(.*)$/

... because this appears to be what characterizes “source-lines of interest.”   viz:

• Beginning at start-of-line, one-or-more alphanumeric characters, which is “group #1.”
• A right-parenthesis character, optionally surrounded by whitespace.
• Everything else to the end of such a line, which is “group #2.”