Style fixes in soc.models.document module (adding of missing whitespaces).
Style fixes in soc.models.document module (adding of missing whitespaces).

Patch by: Pawel Solyga
Reviewed by: to-be-reviewed

MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging