Using 'Bash on Ubuntu on Windows' on Windows 10 (Insider Preview), git version 1.9.1
git config --list
As others pointed out, there actually were characters being displayed, it was just a color issue - The background and the font color were both white.
It is possible to configure the font colors for most git output and, in the
git diff case, you can actually change the color of different sections of the output. To change the color of the top section (the 'meta' section) of the output, use the following command:
git config --global color.diff.meta "blue"
You can omit the
--global if you only want the changes to affect the current session and user, and you can use different colors.
More details can be found here: https://git-scm.com/book/en/v2/Customizing-Git-Git-Configuration