t0020-crlf.sh: use the $( ... ) construct for command substitution

diff --git a/git-rebase.sh b/git-rebase.sh
index 5f6732bf3dce78966da1cbb83d4094d584f92598..a209ab9ce4ecc58ebaac293cd21cf3c031447abf 100755 (executable)
--- a/git-rebase.sh
+++ b/git-rebase.sh
@@ -462,8 +462,8 @@ then
 else
        if test -z "$onto"
        then
-               empty_tree=`git hash-object -t tree /dev/null`
-               onto=`git commit-tree $empty_tree </dev/null`
+               empty_tree=$(git hash-object -t tree /dev/null)
+               onto=$(git commit-tree $empty_tree </dev/null)
                squash_onto="$onto"
        fi
        unset upstream_name
@@ -521,10 +521,10 @@ case "$#" in
        ;;
 0)
        # Do not need to switch branches, we are already on it.
-       if branch_name=`git symbolic-ref -q HEAD`
+       if branch_name=$(git symbolic-ref -q HEAD)
        then
                head_name=$branch_name
-               branch_name=`expr "z$branch_name" : 'zrefs/heads/\(.*\)'`
+               branch_name=$(expr "z$branch_name" : 'zrefs/heads/\(.*\)')
        else
                head_name="detached HEAD"
                branch_name=HEAD ;# detached