doc: backpatch MVCC wording improvements to 9.1
Per request from Thom Brown
Branch
------
REL9_1_STABLE
Details
-------
http://git.postgresql.org/pg/commitdiff/a2d44f526ec4b9832b3fff852981652ba9d05e8a
Modified Files
--------------
doc/src/sgml/mvcc.sgml | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)