Translate actual regex in error output?

[thinkerbot]

It's hard to debug what is going on when a match fails... what can be done?

================= expected output like ==================
usage: linecook [options]:.(?m).:\n
\n
options:\n
  -v, --version      print version\n
  -h, --help         print this help\n

======================== but was ========================
usage: linecook [options]\n
\n
options:\n
    -h, --help                       prints this help\n
    -v, --version                    print version\n

=========================================================