[1.1.X] Fixed #13497 -- Corrected various typos and markup problems in docs....

[1.1.X] Fixed #13497 -- Corrected various typos and markup problems in docs. Thanks to Ramiro Morales for the report and patch.

Backport of r13144 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.1.X@13150 bcc190cf-cafb-0310-a4f2-bffc1f526a37