Improves performance in WSL
Fix#1036
* Add excluded_search_path_prefixes setting
Allows filtering the paths used to search for commands
Can be useful to filter out /mnt/ in WSL for performance
* Add test for excluded_search_path_prefixes
* Apply suggestions from code review
Co-authored-by: Pablo Aguiar <scorphus@gmail.com>
Co-authored-by: Pablo Aguiar <scorphus@gmail.com>
* #833: do not require sudo on TravisCI
* #N/A: Add Python dev releases to TravisCI pipeline
Inspired by Brett Cannon's advise [1].
1: https://snarky.ca/how-to-use-your-project-travis-to-help-test-python-itself/
* #837: try and kill proc and its children
* #N/A: show shell information on `thefuck --version`
* #N/A: omit default arguments to get_close_matches
* #842: add settings var to control number of close matches
* #N/A: remove `n` from the list of `get_closest`'s args
