[PATCH 066/144] t5517-push-mirror.sh: use the $( ... ) construct for command substitution

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.

Signed-off-by: Elia Pinto <redacted>
---
 t/t5517-push-mirror.sh |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/t/t5517-push-mirror.sh b/t/t5517-push-mirror.sh
index 12a5dfb..02f160a 100755
--- a/t/t5517-push-mirror.sh
+++ b/t/t5517-push-mirror.sh

@@ -4,7 +4,7 @@ test_description='pushing to a mirror repository'
 
 . ./test-lib.sh
 
-D=`pwd`
+D=$(pwd)
 
 invert () {
 	if "$@"; then

-- 
1.7.10.4