Bug in git-diff output

From: rocketscienc01100101 . <rocketscienc01100101@gmail.com>
Date: Apr 1, 2014, 10:49 UTC
Message-ID: <CALgQ2n-vPK6_0LnWA_AAD2GLvepjLN4A3UZFCAWzEp9r_=XOVg@mail.gmail.com>

I tried to get a diff between HEAD and the current version of my project, so I did "git diff".

It's a web project with a CSS file that contains the following CSS rule:

a[href^=tel] {
    color:inherit;
    text-decoration:none;
}

Now, whenever I do "git diff", it will always show the a[href^=tel] part and mess up the output, even when I didn't change anything near that line. The problem is easily reproducable in a newly created repository.

git --version git version 1.9.1