Snippet 'shoobx' as alias for 'sb'
Snippets for Python tests
Switching between foo.in and foo.out (vim's test cases)
Different background for everything beyond column 80
^P/^N completion on the command line

Sadly this doesn't pay attention to completion settings and doesn't
complete from ctags.
Use \ls in insert mode to list snippets

(I'm not sure now that's a good idea.  Hmm.  When I specified this
option I didn't realize it was meant for insert mode.)
Snippets for tox.ini