doc: Fix 2 syntax errors.

Signed-off-by: Karl Eichwalder <ke@suse.de>
doc: remove superfluous white spaces (for testing)

Signed-off-by: Karl Eichwalder <ke@suse.de>
Merge pull request #2911 from keichwa/wip-doc-rados

Wip doc rados

Reviewed-by: Loic Dachary <ldachary@redhat.com>