Signed-off-by: Jonathan Corbet <corbet@lwn.net>

The Sphinx output directory is generated.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Add some missing files to .gitignore.
Push Documentation/.gitignore down into subdirectories.
Signed-off-by: Peter Foley <pefoley2@pefoley.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

Signed-off-by: Jan III Sobieski <jan3sobi3ski@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>