Clean up import order.

Add a tag --process-short-name to force display of processes short name instead of full path (issue #407)

Highlight the nice value of a process when is different from 32 (normal).

One-line docstring should not occupy 3 lines
Expected 1 blank line *before* class docstring
First line should end with '.'
Blank line missing between one-line summary and description
No blank lines allowed *after* method docstring
Use r""" if any backslashes in a docstring

Use format() instead of % method.