' is not valid HTML 4.01, so print the plain character instead.

src/bin/psql/print.c

@@ -3,7 +3,7 @@
  *
  * Copyright (c) 2000-2005, PostgreSQL Global Development Group
  *
- * $PostgreSQL: pgsql/src/bin/psql/print.c,v 1.83 2006/02/12 02:56:21 tgl Exp $
+ * $PostgreSQL: pgsql/src/bin/psql/print.c,v 1.84 2006/02/18 22:54:50 petere Exp $
  */
 #include "postgres_fe.h"
 #include "common.h"
@@ -918,9 +918,6 @@ html_escaped_print(const char *in, FILE *fout)
 			case '"':
 				fputs(""", fout);
 				break;
-			case '\'':
-				fputs("'", fout);
-				break;
 			case ' ':
 				/* protect leading space, for EXPLAIN output */
 				if (leading_space)