The Git CodingGuidelines prefer the $(...) construct for command
substitution instead of using the backquotes `...`.

The backquoted form is the traditional method for command
substitution, and is supported by POSIX.  However, all but the
simplest uses become complicated quickly.  In particular, embedded
command substitutions and/or the use of double quotes require
careful escaping with the backslash character.

The patch was generated by:

for _f in $(find . -name "*.sh")
do
   sed -i 's@`\(.*\)`@$(\1)@g' ${_f}
done

and then carefully proof-read.
Signed-off-by: NElia Pinto <gitter.spiros@gmail.com>
Reviewed-by: NMatthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

This uses the remove-dashes target to replace "git-frotz" to "git frotz".
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

We still have too few of them, but we have to start from somewhere.
The general rule is to make tests easy to debug when run with -v (notice
use of seemingly useless echo everywhere in the new tests).
Signed-off-by: NJunio C Hamano <junkio@cox.net>