doc: clarify when row-level locks are released

Bruce Momjian <bruce@momjian.us>

Commit: 046fd4f364157fca85eadfddb0f0e8e5d7ceef26
Author: Bruce Momjian <bruce@momjian.us>
Date: 2020-03-31T21:57:44Z
Releases: 13.0
doc:  clarify when row-level locks are released

They are released just like table-level locks.  Also clean up wording.
(Uses wording "rolled back to".)

Reported-by: me@sillymon.ch

Discussion: https://postgr.es/m/158074944048.1095.4309647363871637715@wrigleys.postgresql.org

Backpatch-through: 9.5

Files

PathChange+/−
doc/src/sgml/mvcc.sgml modified +5 −2

Documentation touched