The Git CodingGuidelines prefer the $( ... ) construct for command
substitution instead of using the back-quotes, or grave accents (`..`).

The backquoted form is the historical 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. Because of this the POSIX shell adopted the $(…) feature from
the Korn shell.

The patch was generated by the simple script

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

Signed-off-by: Elia Pinto <gitter.spi...@gmail.com>
---
 t/t1511-rev-parse-caret.sh |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/t/t1511-rev-parse-caret.sh b/t/t1511-rev-parse-caret.sh
index 15973f2..7043ba7 100755
--- a/t/t1511-rev-parse-caret.sh
+++ b/t/t1511-rev-parse-caret.sh
@@ -6,11 +6,11 @@ test_description='tests for ref^{stuff}'
 
 test_expect_success 'setup' '
        echo blob >a-blob &&
-       git tag -a -m blob blob-tag `git hash-object -w a-blob` &&
+       git tag -a -m blob blob-tag $(git hash-object -w a-blob) &&
        mkdir a-tree &&
        echo moreblobs >a-tree/another-blob &&
        git add . &&
-       TREE_SHA1=`git write-tree` &&
+       TREE_SHA1=$(git write-tree) &&
        git tag -a -m tree tree-tag "$TREE_SHA1" &&
        git commit -m Initial &&
        git tag -a -m commit commit-tag &&
-- 
1.7.10.4

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