First step in the Vim 7.3 branch.  Changed version numbers.
diff --git a/README_extra.txt b/README_extra.txt
index b1b02a5..613616d 100644
--- a/README_extra.txt
+++ b/README_extra.txt
@@ -1,4 +1,4 @@
-README_extra.txt for version 7.2 of Vim: Vi IMproved.
+README_extra.txt for version 7.3a of Vim: Vi IMproved.
 
 The extra archive of Vim is to be used in combination with the source archive
 (vim-7.2-src.tar.gz).  The extra archive is useless without it.