Fix spelling mistake in pgpass documentation change.

Per Peter.

doc/src/sgml/libpq.sgml

@@ -6495,7 +6495,7 @@ myEventProc(PGEventId evtId, void *evtInfo, void *passThrough)
 <replaceable>hostname</replaceable>:<replaceable>port</replaceable>:<replaceable>database</replaceable>:<replaceable>username</replaceable>:<replaceable>password</replaceable>
 </synopsis>
    (You can add a reminder comment to the file by copying the line above and
-   preceeding it with <literal>#</>.)
+   preceding it with <literal>#</>.)
    Each of the first four fields can be a literal value, or
    <literal>*</literal>, which matches anything.  The password field from
    the first line that matches the current connection parameters will be