patch 7.4.2251

Problem:    In rare cases diffing 4 buffers is not enough.
Solution:   Raise the limit to 8. (closes #1000)

Author: brammool

runtime/doc/diff.txt

@@ -1,12 +1,12 @@
-*diff.txt*      For Vim version 7.4.  Last change: 2015 Nov 01
+*diff.txt*      For Vim version 7.4.  Last change: 2016 Aug 24
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
 
 
 				*diff* *vimdiff* *gvimdiff* *diff-mode*
-This file describes the |+diff| feature: Showing differences between two,
-three or four versions of the same file.
+This file describes the |+diff| feature: Showing differences between two to
+eight versions of the same file.
 
 The basics are explained in section |08.7| of the user manual.
 
@@ -117,7 +117,7 @@ To make these commands use a vertical split, prepend |:vertical|.  Examples: >
 If you always prefer a vertical split include "vertical" in 'diffopt'.
 
 							*E96*
-There can be up to four buffers with 'diff' set.
+There can be up to eight buffers with 'diff' set.
 
 Since the option values are remembered with the buffer, you can edit another
 file for a moment and come back to the same file and be in diff mode again.

src/structs.h

@@ -2296,7 +2296,7 @@ struct file_buffer
 /*
  * Stuff for diff mode.
  */
-# define DB_COUNT 4	/* up to four buffers can be diff'ed */
+# define DB_COUNT 8	/* up to eight buffers can be diff'ed */
 
 /*
  * Each diffblock defines where a block of lines starts in each of the buffers

src/version.c

@@ -763,6 +763,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2251,
 /**/
     2250,
 /**/