Git Show: Use %n for message and add Linguist comment.

Change-Id: I09af9ea6531af2f768e393f37e28962860b47e5c
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Jarek Kobus <jaroslaw.kobus@digia.com>
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>