Trying to be lazy and comparing files with fake-editor.sh to avoid
having to provide another example text does not work well: the blob
name changes when SHELL_PATH changes, and so does the 'index' line
in the diff.

Therefore provide a second example text.

Noticed by Mike Ralphson.
Signed-off-by: NJohannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>