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/t4012-diff-binary.sh |   16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/t/t4012-diff-binary.sh b/t/t4012-diff-binary.sh
index 1215ae5..643d729 100755
--- a/t/t4012-diff-binary.sh
+++ b/t/t4012-diff-binary.sh
@@ -67,18 +67,18 @@ test_expect_success C_LOCALE_OUTPUT 'apply detecting 
corrupt patch correctly' '
        git diff >output &&
        sed -e "s/-CIT/xCIT/" <output >broken &&
        test_must_fail git apply --stat --summary broken 2>detected &&
-       detected=`cat detected` &&
-       detected=`expr "$detected" : "fatal.*at line \\([0-9]*\\)\$"` &&
-       detected=`sed -ne "${detected}p" broken` &&
+       detected=$(cat detected) &&
+       detected=$(expr "$detected" : "fatal.*at line \\([0-9]*\\)\$") &&
+       detected=$(sed -ne "${detected}p" broken) &&
        test "$detected" = xCIT
 '
 
 test_expect_success C_LOCALE_OUTPUT 'apply detecting corrupt patch correctly' '
        git diff --binary | sed -e "s/-CIT/xCIT/" >broken &&
        test_must_fail git apply --stat --summary broken 2>detected &&
-       detected=`cat detected` &&
-       detected=`expr "$detected" : "fatal.*at line \\([0-9]*\\)\$"` &&
-       detected=`sed -ne "${detected}p" broken` &&
+       detected=$(cat detected) &&
+       detected=$(expr "$detected" : "fatal.*at line \\([0-9]*\\)\$") &&
+       detected=$(sed -ne "${detected}p" broken) &&
        test "$detected" = xCIT
 '
 
@@ -88,7 +88,7 @@ test_expect_success 'initial commit' 'git commit -a -m 
initial'
 test_expect_success 'diff-index with --binary' '
        echo AIT >a && mv b e && echo CIT >c && cat e >d &&
        git update-index --add --remove a b c d e &&
-       tree0=`git write-tree` &&
+       tree0=$(git write-tree) &&
        git diff --cached --binary >current &&
        git apply --stat --summary current
 '
@@ -96,7 +96,7 @@ test_expect_success 'diff-index with --binary' '
 test_expect_success 'apply binary patch' '
        git reset --hard &&
        git apply --binary --index <current &&
-       tree1=`git write-tree` &&
+       tree1=$(git write-tree) &&
        test "$tree1" = "$tree0"
 '
 
-- 
1.7.10.4

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