t/t6015-rev-list-show-all-parents.sh: use the $( ... ) construct for command substitution

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
	perl -i -pe 'BEGIN{undef $/;} s/`(.+?)`/\$(\1)/smg'  "${_f}"
done

and then carefully proof-read.

Signed-off-by: Elia Pinto <gitter.spiros@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t6015-rev-list-show-all-parents.sh b/t/t6015-rev-list-show-all-parents.sh
index 8b146fb..3c73c93 100755 (executable)
--- a/t/t6015-rev-list-show-all-parents.sh
+++ b/t/t6015-rev-list-show-all-parents.sh
@@ -6,11 +6,11 @@ test_description='--show-all --parents does not rewrite TREESAME commits'
 
 test_expect_success 'set up --show-all --parents test' '
        test_commit one foo.txt &&
-       commit1=`git rev-list -1 HEAD` &&
+       commit1=$(git rev-list -1 HEAD) &&
        test_commit two bar.txt &&
-       commit2=`git rev-list -1 HEAD` &&
+       commit2=$(git rev-list -1 HEAD) &&
        test_commit three foo.txt &&
-       commit3=`git rev-list -1 HEAD`
+       commit3=$(git rev-list -1 HEAD)
        '
 
 test_expect_success '--parents rewrites TREESAME parents correctly' '