difftool: print list of valid tools with '--tool-help'

diff --git a/GIT-VERSION-GEN b/GIT-VERSION-GEN
index d40b287e5a91b29d0807a84077d8f6a89e073159..1c06cec047aec084453954b87718fbd4abf87c2b 100755 (executable)
--- a/GIT-VERSION-GEN
+++ b/GIT-VERSION-GEN
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 GVF=GIT-VERSION-FILE
-DEF_VER=v1.7.3.4
+DEF_VER=v1.7.10-rc1
 
 LF='
 '