t9107-git-svn-migrate.sh: use the $( ... ) construct for command substitution

diff --git a/t/t7003-filter-branch.sh b/t/t7003-filter-branch.sh
index 869e0bf0735033f66c5cba44d107f799fc07b112..8868e6e090e0528f41e11473e7efee3ca54bd6b3 100755 (executable)
--- a/t/t7003-filter-branch.sh
+++ b/t/t7003-filter-branch.sh
@@ -387,7 +387,7 @@ test_expect_success 'setup submodule' '
        git branch original HEAD
 '
 
-orig_head=`git show-ref --hash --head HEAD`
+orig_head=$(git show-ref --hash --head HEAD)
 
 test_expect_success 'rewrite submodule with another content' '
        git filter-branch --tree-filter "test -d submod && {
@@ -396,7 +396,7 @@ test_expect_success 'rewrite submodule with another content' '
                                         mkdir submod &&
                                         : > submod/file
                                         } || :" HEAD &&
-       test $orig_head != `git show-ref --hash --head HEAD`
+       test $orig_head != $(git show-ref --hash --head HEAD)
 '
 
 test_expect_success 'replace submodule revision' '
@@ -405,7 +405,7 @@ test_expect_success 'replace submodule revision' '
            "if git ls-files --error-unmatch -- submod > /dev/null 2>&1
             then git update-index --cacheinfo 160000 0123456789012345678901234567890123456789 submod
             fi" HEAD &&
-       test $orig_head != `git show-ref --hash --head HEAD`
+       test $orig_head != $(git show-ref --hash --head HEAD)
 '
 
 test_expect_success 'filter commit message without trailing newline' '