[PATCH v2 5/5] t/lib-commit-graph.sh: avoid sub-shell in `graph_git_behavior()`

[Taylor Blau <me@ttaylorr.com>]

In a previous commit, we introduced a sub-shell in the implementation of
`graph_git_behavior()`, in order to allow us to pass `-C "$DIR"`
directly to the git processes spawned by `graph_git_two_modes()`.

Now that its callers are always operating from the "$TRASH_DIRECTORY"
instead of one of its sub-directories, we can drop the inner sub-shell,
as it is no longer required.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
---
 t/lib-commit-graph.sh | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/t/lib-commit-graph.sh b/t/lib-commit-graph.sh
index c8bd76a7777..89b26676fbb 100755
--- a/t/lib-commit-graph.sh
+++ b/t/lib-commit-graph.sh
@@ -27,14 +27,11 @@ graph_git_behavior() {
 	BRANCH=$3
 	COMPARE=$4
 	test_expect_success "check normal git operations: $MSG" '
-		(
-			cd "$TRASH_DIRECTORY" &&
-			graph_git_two_modes "${DIR:+-C $DIR} log --oneline $BRANCH" &&
-			graph_git_two_modes "${DIR:+-C $DIR} log --topo-order $BRANCH" &&
-			graph_git_two_modes "${DIR:+-C $DIR} log --graph $COMPARE..$BRANCH" &&
-			graph_git_two_modes "${DIR:+-C $DIR} branch -vv" &&
-			graph_git_two_modes "${DIR:+-C $DIR} merge-base -a $BRANCH $COMPARE"
-		)
+		graph_git_two_modes "${DIR:+-C $DIR} log --oneline $BRANCH" &&
+		graph_git_two_modes "${DIR:+-C $DIR} log --topo-order $BRANCH" &&
+		graph_git_two_modes "${DIR:+-C $DIR} log --graph $COMPARE..$BRANCH" &&
+		graph_git_two_modes "${DIR:+-C $DIR} branch -vv" &&
+		graph_git_two_modes "${DIR:+-C $DIR} merge-base -a $BRANCH $COMPARE"
 	'
 }
 
-- 
2.41.0.399.g887006eab46