Add mention of :00 seconds.

HISTORY

@@ -215,6 +215,7 @@ Add new DateStyle values MDY, DMY, and YMD, honor US and European for
 'now' will no longer work as a default, use now() (change required for prepared
   statements) (Tom)
 Assume NaN value to be larger than any other value in comparisons (Tom)
+Prevent timestamp from supressing ':00' seconds display
 
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