Add a note about discouraging whitespace- or formatting-only patches.

      add unnecessary bytes, add visual clutter to the patches and can also

      occasionally cause unnecessary merge conflicts. Some IDE's can be

      configured to automatically remove them and most VCS tools can be set to

      highlight them in diff outputs.

      highlight them in diff outputs. Note, however, that patches which only

      remove whitespace (or only make changes for nominal PEP 8 conformance)

      are likely to be rejected, since they only introduce noise rather than

      code improvement. Tidy up when you're next changing code in the area.

    * Please don't put your name in the code you contribute. Our policy is to

      keep contributors' names in the ``AUTHORS`` file distributed with Django