Doc: Remove the use of a duplicate word.

Amit Kapila · Amit Kapila · commit 15113bfb467a · 2022-09-26T09:26:47.000+05:30
This has been removed in HEAD by commit a234177, so doing just backpatch to 15 where it was introduced in commit 860ea46. Author: Zhang Mingli Discussion: https://postgr.es/m/OS0PR01MB57162559C01FE2848C12E8F7944D9@OS0PR01MB5716.jpnprd01.prod.outlook.com
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
@@ -2223,7 +2223,7 @@ pg_dumpall -p 5432 | psql -d postgres -p 5433
    With <acronym>SSL</acronym> support compiled in, the
    <productname>PostgreSQL</productname> server can be started with
    support for encrypted connections using <acronym>TLS</acronym> protocols
-   enabled by by setting the parameter
+   enabled by setting the parameter
    <xref linkend="guc-ssl"/> to <literal>on</literal> in
    <filename>postgresql.conf</filename>.  The server will listen for both normal
    and <acronym>SSL</acronym> connections on the same TCP port, and will negotiate
