doc: Fix typos and other minor issues

Author: Alexander Lakhin 

diff --git a/doc/src/sgml/perform.sgml b/doc/src/sgml/perform.sgml
index 2af1738576a41373bdf4440257fb353acc379129..fb4225ee056b3fe85eb03c47e3634893334c64d9 100644 (file)
--- a/doc/src/sgml/perform.sgml
+++ b/doc/src/sgml/perform.sgml
@@ -1555,7 +1555,7 @@ SELECT * FROM x, y, a, b, c WHERE something AND somethingelse;
      
       
        Increase  and 
-       linkend="guc-checkpoint-timeout"> ; this reduces the frequency
+       linkend="guc-checkpoint-timeout">; this reduces the frequency
        of checkpoints, but increases the storage requirements of
        /pg_xlog.