t/t5300-pack-object.sh: use the $( ... ) construct for command substitution

diff --git a/t/t5300-pack-object.sh b/t/t5300-pack-object.sh
index 20c1961515a02e3411d02a5656bf8a9dc6b198de..fc2be63e02d85682cd24457ee646c8c626ca967a 100755 (executable)
--- a/t/t5300-pack-object.sh
+++ b/t/t5300-pack-object.sh
@@ -8,7 +8,7 @@ test_description='git pack-object
 '
 . ./test-lib.sh
 
-TRASH=`pwd`
+TRASH=$(pwd)
 
 test_expect_success \
     'setup' \
@@ -20,8 +20,8 @@ test_expect_success \
      test-genrandom "seed b" 2097152 > b_big &&
      git update-index --add a a_big b b_big c &&
      cat c >d && echo foo >>d && git update-index --add d &&
-     tree=`git write-tree` &&
-     commit=`git commit-tree $tree </dev/null` && {
+     tree=$(git write-tree) &&
+     commit=$(git commit-tree $tree </dev/null) && {
         echo $tree &&
         echo $commit &&
         git ls-tree $tree | sed -e "s/.* \\([0-9a-f]*\\)       .*/\\1/"
@@ -29,7 +29,7 @@ test_expect_success \
         git diff-tree --root -p $commit &&
         while read object
         do
-           t=`git cat-file -t $object` &&
+           t=$(git cat-file -t $object) &&
            git cat-file $t $object || return 1
         done <obj-list
      } >expect'
@@ -147,7 +147,7 @@ test_expect_success \
         git diff-tree --root -p $commit &&
         while read object
         do
-           t=`git cat-file -t $object` &&
+           t=$(git cat-file -t $object) &&
            git cat-file $t $object || return 1
         done <obj-list
     } >current &&
@@ -162,7 +162,7 @@ test_expect_success \
         git diff-tree --root -p $commit &&
         while read object
         do
-           t=`git cat-file -t $object` &&
+           t=$(git cat-file -t $object) &&
            git cat-file $t $object || return 1
         done <obj-list
     } >current &&
@@ -177,7 +177,7 @@ test_expect_success \
         git diff-tree --root -p $commit &&
         while read object
         do
-           t=`git cat-file -t $object` &&
+           t=$(git cat-file -t $object) &&
            git cat-file $t $object || return 1
         done <obj-list
     } >current &&
@@ -252,8 +252,8 @@ test_expect_success \
 
 test_expect_success \
     'verify-pack catches a corrupted sum of the index file itself' \
-    'l=`wc -c <test-3.idx` &&
-     l=`expr $l - 20` &&
+    'l=$(wc -c <test-3.idx) &&
+     l=$(expr $l - 20) &&
      cat test-1-${packname_1}.pack >test-3.pack &&
      printf "%20s" "" | dd of=test-3.idx count=20 bs=1 conv=notrunc seek=$l &&
      if git verify-pack test-3.pack