updated for version 7.3.523
Problem:    ":diffupdate" doesn't check for files changed elsewhere.
Solution:   Add the ! flag. (Christian Brabandt)
diff --git a/src/version.c b/src/version.c
index 0c866c5..82672b1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -715,6 +715,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    523
+/**/
     522,
 /**/
     521,