LUDOC-11 misc: Trivial updates to correct spelling errors

LUDOC-11 misc:  Trivial updates to correct spelling errors

Trivial updates that correct spelling errors found while
reviewing a rendered version of the manual (some errors
are created by running an xml tag into the next word
without a space).

Signed-off-by: Joseph Gmitter <joseph.gmitter@intel.com>
Change-Id: Id7709e4fcc776b659213c1298693972e7a0dc8de
Reviewed-on: http://review.whamcloud.com/23580
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>