doc: restore wording from recent patch "rolled back to"
Reported-by: Tom Lane
Discussion:
Backpatch-through: 9.5 - 12
@@ -1041,7 +1041,7 @@ ERROR: could not serialize access due to read/write dependencies among transact
<para>
Once acquired, a lock is normally held until the end of the transaction. But if a
lock is acquired after establishing a savepoint, the lock is released
- immediately if the savepoint is rolled back. This is consistent with
+ immediately if the savepoint is rolled back to. This is consistent with
the principle that <command>ROLLBACK</command> cancels all effects of the
commands since the savepoint. The same holds for locks acquired within a
<application>PL/pgSQL</application> exception block: an error escape from the block
