Doc: typo in config.sgml

[Tatsuo Ishii]

I think there's an unnecessary underscore in config.sgml.
Attached patch fixes it.

Best reagards,
--
Tatsuo Ishii
SRA OSS K.K.
English: http://www.sraoss.co.jp/index_en/
Japanese:http://www.sraoss.co.jp

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 0aec11f443..08173ecb5c 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -9380,7 +9380,7 @@ COPY postgres_log FROM '/full/path/to/logfile.csv' WITH csv;
        <para>
         If <varname>transaction_timeout</varname> is shorter or equal to
         <varname>idle_in_transaction_session_timeout</varname> or <varname>statement_timeout</varname>
-        then the longer timeout is ignored.
+        then the longer timeout is ignored.
        </para>
 
        <para>