Fix docs typo

diff --git a/doc/src/sgml/ref/alter_type.sgml b/doc/src/sgml/ref/alter_type.sgml
index 1ff53923fb6fd6a665802a497cf81890b3fbe3c1..588887e1f9b89bc0cb8f73f9b5dcb8a66b17bfb9 100644 (file)
--- a/doc/src/sgml/ref/alter_type.sgml
+++ b/doc/src/sgml/ref/alter_type.sgml
@@ -115,7 +115,7 @@ ALTER TYPE <replaceable class="PARAMETER">name</replaceable> ADD VALUE [ IF NOT
       list of values.
      </para>
      <para>
-      If <literal>IF NOT EXISTS</literal is used, it is not an error if the
+      If <literal>IF NOT EXISTS</literal> is used, it is not an error if the
       type already contains the new value, and no action  is taken. Otherwise,
       an error will occur if the new value is already present.
      </para>