First step in the Vim 7.3 branch.  Changed version numbers.
diff --git a/README_src.txt b/README_src.txt
index 341b07c..2acf9ee 100644
--- a/README_src.txt
+++ b/README_src.txt
@@ -1,4 +1,4 @@
-README_src.txt for version 7.2 of Vim: Vi IMproved.
+README_src.txt for version 7.3a of Vim: Vi IMproved.
 
 The source archive contains the files needed to compile Vim on Unix systems.
 It is packed for Unix systems (NL line separator).  It is also used for other