Respect GIT_INDEX_FILE when diffing for status buffer
tree9777d9a45d6da5c7664f7ef1800cfff216f23179
-rw-r--r-- 45 .gitattributes
drwxr-xr-x - .github
-rw-r--r-- 10 .gitignore
-rw-r--r-- 1494 CONTRIBUTING.markdown
-rw-r--r-- 6321 README.markdown
drwxr-xr-x - autoload
drwxr-xr-x - doc
drwxr-xr-x - ftdetect
drwxr-xr-x - ftplugin
drwxr-xr-x - plugin
drwxr-xr-x - syntax