Update docs/error message for CSV quote/escape --- must be ASCII.

Backpatch doc change to 8.2.X.

doc/src/sgml/ref/copy.sgml

 <!--
-$PostgreSQL: pgsql/doc/src/sgml/ref/copy.sgml,v 1.79 2007/04/18 00:17:56 momjian Exp $
+$PostgreSQL: pgsql/doc/src/sgml/ref/copy.sgml,v 1.80 2007/04/18 02:28:22 momjian Exp $
 PostgreSQL documentation
 -->
 
@@ -225,7 +225,7 @@ COPY { <replaceable class="parameter">tablename</replaceable> [ ( <replaceable c
     <term><replaceable class="parameter">quote</replaceable></term>
     <listitem>
      <para>
-      Specifies the quotation character in <literal>CSV</> mode.
+      Specifies the ASCII quotation character in <literal>CSV</> mode.
       The default is double-quote.
      </para>
     </listitem>
@@ -235,7 +235,7 @@ COPY { <replaceable class="parameter">tablename</replaceable> [ ( <replaceable c
     <term><replaceable class="parameter">escape</replaceable></term>
     <listitem>
      <para>
-      Specifies the character that should appear before a
+      Specifies the ASCII character that should appear before a
       <literal>QUOTE</> data character value in <literal>CSV</> mode.
       The default is the <literal>QUOTE</> value (usually double-quote).
      </para>

src/backend/commands/copy.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/commands/copy.c,v 1.281 2007/04/18 00:38:57 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/commands/copy.c,v 1.282 2007/04/18 02:28:22 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -893,7 +893,7 @@ DoCopy(const CopyStmt *stmt, const char *queryString)
 	if (cstate->csv_mode && strlen(cstate->quote) != 1)
 		ereport(ERROR,
 				(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
-				 errmsg("COPY quote must be a single character")));
+				 errmsg("COPY quote must be a single ASCII character")));
 
 	/* Check escape */
 	if (!cstate->csv_mode && cstate->escape != NULL)
@@ -904,7 +904,7 @@ DoCopy(const CopyStmt *stmt, const char *queryString)
 	if (cstate->csv_mode && strlen(cstate->escape) != 1)
 		ereport(ERROR,
 				(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
-				 errmsg("COPY escape must be a single character")));
+				 errmsg("COPY escape must be a single ASCII character")));
 
 	/* Check force_quote */
 	if (!cstate->csv_mode && force_quote != NIL)