Fix some minor issues in view pretty-printing.

Code review for commit 2f582f76: don't use
a static variable for what ought to be a deparse_context field, fix
non-multibyte-safe test for spaces, avoid useless and potentially O(N^2)
(though admittedly with a very small constant) calculations of wrap
positions when we aren't going to wrap.

doc/src/sgml/func.sgml

@@ -13858,7 +13858,7 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
       <row>
        <entry><literal><function>pg_get_viewdef(<parameter>view_name</parameter>, <parameter>pretty_bool</>)</function></literal></entry>
        <entry><type>text</type></entry>
-       <entry>get underlying <command>SELECT</command> command for view,
+       <entry>get underlying <command>SELECT</command> command for view;
               lines with fields are wrapped to 80 columns if <parameter>pretty_bool</parameter> is true (<emphasis>deprecated</emphasis>)</entry>
       </row>
       <row>
@@ -13869,14 +13869,15 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
       <row>
        <entry><literal><function>pg_get_viewdef(<parameter>view_oid</parameter>, <parameter>pretty_bool</>)</function></literal></entry>
        <entry><type>text</type></entry>
-       <entry>get underlying <command>SELECT</command> command for view,
+       <entry>get underlying <command>SELECT</command> command for view;
               lines with fields are wrapped to 80 columns if <parameter>pretty_bool</parameter> is true</entry>
       </row>
       <row>
-       <entry><literal><function>pg_get_viewdef(<parameter>view_oid</parameter>, <parameter>wrap_int</>)</function></literal></entry>
+       <entry><literal><function>pg_get_viewdef(<parameter>view_oid</parameter>, <parameter>wrap_column_int</>)</function></literal></entry>
        <entry><type>text</type></entry>
-       <entry>get underlying <command>SELECT</command> command for view,
-              wrapping lines with fields as specified, pretty printing is implied</entry>
+       <entry>get underlying <command>SELECT</command> command for view;
+              lines with fields are wrapped to specified number of columns,
+              pretty printing is implied</entry>
       </row>
       <row>
        <entry><literal><function>pg_options_to_table(<parameter>reloptions</parameter>)</function></literal></entry>