First step in the Vim 7.3 branch.  Changed version numbers.
diff --git a/runtime/doc/vi_diff.txt b/runtime/doc/vi_diff.txt
index 06d327c..0365a90 100644
--- a/runtime/doc/vi_diff.txt
+++ b/runtime/doc/vi_diff.txt
@@ -1,4 +1,4 @@
-*vi_diff.txt*   For Vim version 7.2.  Last change: 2008 Jun 28
+*vi_diff.txt*   For Vim version 7.3a.  Last change: 2008 Jun 28
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar