line datetime.y:2.

Patience diff algorithm stolen from http://bazaar.launchpad.net/~bzr-pqm/bzr/bzr.dev/view/head:/bzrlib/_patiencediff_py.py This is pretty much a straight-up port so possibly should be considered © Bram Cohen / Canonical Ltd.

Is this string adding a factoid?.

Does this string look like a URL to you? This should be fairly conservative, I hope: s starts with http:// or https:// and contains no spaces.

Removes mIRC-style colours from a string.

A basic string lexer that simplifies extracting substrings.