The gitignore man page states that the lines starting with '#' are
ignored, but the sharp characters inside a line do not start a comment.
They are part of the regex. The comments must be seperated on their own line.
As mentioned in issue #46, you can not use "!gitk" in a
command line as the exclamation mark would be interpreted
by the shell instead of being passed to the command. To
disable shell interpretation, you must use single quotes.