gitconfig: Add comment.

diff --git a/gitconfig.m4 b/gitconfig.m4
index 1eb17f2541d56db264618d4626644db52d9585aa..970014fc564b5c63c7120282bc3cb51103a86fe4 100644 (file)
--- a/gitconfig.m4
+++ b/gitconfig.m4
@@ -13,6 +13,7 @@ include(../lib.m4)
 
 [core]
        editor = vim
+       # Can't use ~/ because of older git versions.
        excludesfile = GITIGNORE
 
 # Use pager for the following commands.