Add 'ignorewhitesnake' to ~/.gitconfig.

diff

diff --git a/home/.gitconfig b/home/.gitconfig
index 4420cbe..d4bc6e4 100644
--- a/home/.gitconfig
+++ b/home/.gitconfig
@@ -17,6 +17,9 @@
 [merge]
   conflictstyle = diff3

+[rock]
+  ignorewhitesnake = true
+
 [github]
        user = englishm
 [alias]