git: Use vimdiff as mergetool on Debian.

diff --git a/gitconfig.m4 b/gitconfig.m4
index cc29fcbed7b319b80362f3bad147dde9ab98bdce..9ef54b0a873dfe7219002761b0e48060f3971680 100644 (file)
--- a/gitconfig.m4
+++ b/gitconfig.m4
@@ -31,5 +31,8 @@ include(../lib.m4)
 IF(OS, darwin)
        tool = opendiff
 FI
+IF(OS, debian)
+       tool = vimdiff
+FI
 
 # vim: ft=gitconfig