doc: Fix grammar.

robertmhaas · robertmhaas · commit 6614aaa699bc · 2018-02-27T14:41:10.000-05:00
Michael Paquier Discussion: http://postgr.es/m/20180209135327.GC29003@paquier.xyz
diff --git a/doc/src/sgml/monitoring.sgml b/doc/src/sgml/monitoring.sgml
@@ -1068,7 +1068,7 @@ postgres   27093  0.0  0.0  30096  2752 ?        Ss   11:34   0:00 postgres: ser
         </row>
         <row>
          <entry><literal>oldserxid</literal></entry>
-         <entry>Waiting to I/O on an oldserxid buffer.</entry>
+         <entry>Waiting for I/O on an oldserxid buffer.</entry>
         </row>
         <row>
          <entry><literal>wal_insert</literal></entry>
