Remove a stray line of debugging
Changes so that it works on Python 2.7 as well as Python 3
Simplify skippable_block_of_four
Simplify contains_control_characters
Simplify contains_control_characters
A small refactoring
pylint: use raw strings for regular expressions
pylint: add some docstrings
pylint: there should be spaces after commas
pylint: add spaces around + signs
pylint: get all lines under 80 characters
pylint: a module name can't have a dash in it
Add a module docstring
pylint: don't use a wildcard import
pylint: avoid warnings about single-letter function parameters
pylint: replace map and filter with generators and list comprehensions
pylint: don't shadow the builtin copyright function
fixup! pylint: there should be spaces after commas
pylint: remove extraneous spaces in parentheses
fixup! pylint: there should be spaces after commas