test_detect_ref_format: fix comment

From: Johannes Schindelin <[email protected]>

When 58aaf59133b (t: introduce GIT_TEST_DEFAULT_REF_FORMAT envvar, 2023-12-29) copy-edited the test_detect_hash function, the code comment was accidentally left unchanged. Let's adjust it.

---
test_detect_ref_format: fix comment

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-2019%2Fdscho%2Ffix-detect-ref-format-comment-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-2019/dscho/fix-detect-ref-format-comment-v1
Pull-Request: https://github.com/gitgitgadget/git/pull/2019

 t/test-lib-functions.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 52d7759bf5..14e238d24d 100644
@@ -1724,7 +1724,7 @@ test_detect_hash () {
 	esac
 }
 
-# Detect the hash algorithm in use.
+# Detect the ref format in use.
 test_detect_ref_format () {
 	echo "${GIT_TEST_DEFAULT_REF_FORMAT:-files}"
 }

base-commit: c4a0c8845e2426375ad257b6c221a3a7d92ecfda

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