First step in the Vim 7.3 branch.  Changed version numbers.
diff --git a/runtime/doc/pi_spec.txt b/runtime/doc/pi_spec.txt
index 268ee4f..14b83b7 100644
--- a/runtime/doc/pi_spec.txt
+++ b/runtime/doc/pi_spec.txt
@@ -1,4 +1,4 @@
-*pi_spec.txt*   For Vim version 7.2.  Last change: 2006 Apr 24
+*pi_spec.txt*   For Vim version 7.3a.  Last change: 2006 Apr 24
 
 by Gustavo Niemeyer ~