Escape greater than and less than characters in docs.

Susanne Ebrecht and me

doc/src/sgml/ref/pg_basebackup.sgml

@@ -406,7 +406,7 @@ PostgreSQL documentation
    To create a backup of a single-tablespace local database and compress
    this with <productname>bzip2</productname>:
    <screen>
-    <prompt>$</prompt> <userinput>pg_basebackup -D - -Ft | bzip2 > backup.tar.bz2</userinput>
+    <prompt>$</prompt> <userinput>pg_basebackup -D - -Ft | bzip2 &gt; backup.tar.bz2</userinput>
    </screen>
    (this command will fail if there are multiple tablespaces in the
    database)

doc/src/sgml/sepgsql.sgml

@@ -105,7 +105,7 @@ $ initdb
 $ vi $PGDATA/postgresql.conf
 $ for DBNAME in template0 template1 postgres; do
   postgres --single -F -O -c exit_on_error=true $DBNAME \
-      < /usr/local/pgsql/share/contrib/sepgsql.sql > /dev/null
+      &lt; /usr/local/pgsql/share/contrib/sepgsql.sql &gt; /dev/null
   done
 </screen>