[PATCH 2/1] t/perf: avoid unnecessary test_export() recursion

[Eric Sunshine <sunshine@sunshineco.com>]

test_export() has been self-recursive since its inception even though a
simple for-loop would have served just as well to append its arguments
to the `test_export_` variable separated by the pipe character "|".
Recently `test_export_` was changed instead to a space-separated list of
tokens to be exported, an operation which can be accomplished via a
single simple assignment, with no need for looping or recursion.
Therefore, simplify the implementation.

While at it, take advantage of the fact that variable names to be
exported are shell identifiers, thus won't be composed of special
characters or whitespace, thus simple a `$*` can be used rather than
magical `"$@"`.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
---

This is a follow-up to [1] as discussed in [2]. It applies cleanly atop
'es/perf-export-fix' and 'master'.

[1]: https://lore.kernel.org/git/20201216073907.62591-1-sunshine@sunshineco.com/
[2]: https://lore.kernel.org/git/CAPig+cR+4Wh4Sgk6UhUML4SHqaQsvYmw_77ih+oec2YmqQJCCg@mail.gmail.com/

t/perf/perf-lib.sh | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/t/perf/perf-lib.sh b/t/perf/perf-lib.sh
index 22d727cef8..e385c6896f 100644
--- a/t/perf/perf-lib.sh
+++ b/t/perf/perf-lib.sh
@@ -147,10 +147,7 @@ test_run_perf_ () {
 	"$GTIME" -f "%E %U %S" -o test_time.$i "$SHELL" -c '
 . '"$TEST_DIRECTORY"/test-lib-functions.sh'
 test_export () {
-	[ $# != 0 ] || return 0
-	test_export_="$test_export_ $1"
-	shift
-	test_export "$@"
+	test_export_="$test_export_ $*"
 }
 '"$1"'
 ret=$?
-- 
2.30.0.rc1.243.g5298b911bd