Merge branch 'jh/p4-various-fixups'

Various cleanups to "git p4".

* jh/p4-various-fixups: (22 commits)
  git-p4: sort imports
  git-p4: seperate multiple statements onto seperate lines
  git-p4: move inline comments to line above
  git-p4: only seperate code blocks by a single empty line
  git-p4: compare to singletons with "is" and "is not"
  git-p4: normalize indentation of lines in conditionals
  git-p4: ensure there is a single space around all operators
  git-p4: ensure every comment has a single #
  git-p4: remove spaces between dictionary keys and colons
  git-p4: remove redundant backslash-continuations inside brackets
  git-p4: remove extraneous spaces before function arguments
  git-p4: place a single space after every comma
  git-p4: removed brackets when assigning multiple return values
  git-p4: remove spaces around default arguments
  git-p4: remove padding from lists, tuples and function arguments
  git-p4: sort and de-duplcate pylint disable list
  git-p4: remove commented code
  git-p4: convert descriptive class and function comments into docstrings
  git-p4: improve consistency of docstring formatting
  git-p4: indent with 4-spaces
  ...