Update reference documentation on may/can/might:

Standard English uses "may", "can", and "might" in different ways:

        may - permission, "You may borrow my rake."

        can - ability, "I can lift that log."

        might - possibility, "It might rain today."

Unfortunately, in conversational English, their use is often mixed, as
in, "You may use this variable to do X", when in fact, "can" is a better
choice.  Similarly, "It may crash" is better stated, "It might crash".

doc/src/sgml/ref/create_operator.sgml

@@ -1,5 +1,5 @@
 <!--
-$PostgreSQL: pgsql/doc/src/sgml/ref/create_operator.sgml,v 1.46 2006/12/23 00:43:08 tgl Exp $
+$PostgreSQL: pgsql/doc/src/sgml/ref/create_operator.sgml,v 1.47 2007/01/31 23:26:03 momjian Exp $
 PostgreSQL documentation
 -->
 
@@ -108,7 +108,7 @@ CREATE OPERATOR <replaceable>name</replaceable> (
       <listitem>
        <para>
         The name of the operator to be defined. See above for allowable
-        characters.  The name may be schema-qualified, for example
+        characters.  The name can be schema-qualified, for example
         <literal>CREATE OPERATOR myschema.+ (...)</>.  If not, then
         the operator is created in the current schema.  Two operators
         in the same schema can have the same name if they operate on