From a3269818d9885400146f44b3866ed0ce6d5f5c5e Mon Sep 17 00:00:00 2001
From: Ryan Boren <ryan@git.wordpress.org>
Date: Mon, 23 Jun 2008 22:45:19 +0000
Subject: [PATCH] better handling of comparing a revision to itself. Props
 mdawaffe. see #6775

git-svn-id: https://develop.svn.wordpress.org/trunk@8176 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-admin/revision.php | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/wp-admin/revision.php b/wp-admin/revision.php
index a00fa8153b..4ec274f375 100644
--- a/wp-admin/revision.php
+++ b/wp-admin/revision.php
@@ -43,6 +43,12 @@ case 'diff' :
 	if ( !current_user_can( 'read_post', $left_revision->ID ) || !current_user_can( 'read_post', $right_revision->ID ) )
 		break;
 
+	// If we're comparing a revision to itself, redirect to the 'view' page for that revision or the edit page for that post
+	if ( $left_revision->ID == $right_revision->ID ) {
+		$redirect = get_edit_post_link( $left_revision->ID );
+		break;
+	}
+
 	// Don't allow reverse diffs?
 	if ( strtotime($right_revision->post_modified_gmt) < strtotime($left_revision->post_modified_gmt) ) {
 		$redirect = add_query_arg( array( 'left' => $right, 'right' => $left ) );