[PATCH v2 2/4] test: refactor to use "test_config"

["Leon Michalak via GitGitGadget" <gitgitgadget@gmail.com>]

From: Leon Michalak <leonmichalak6@gmail.com>

Refactor to use the modern "test_config" test utility instead of manual
"git config" as the former provides clean up on test completion.

This is a prerequisite to the commits that follow which add to this test
file.

Signed-off-by: Leon Michalak <leonmichalak6@gmail.com>
---
 t/t4055-diff-context.sh | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/t/t4055-diff-context.sh b/t/t4055-diff-context.sh
index c66f966a3ab3..1384a8195705 100755
--- a/t/t4055-diff-context.sh
+++ b/t/t4055-diff-context.sh
@@ -47,43 +47,43 @@ test_expect_success 'the default number of context lines is 3' '
 test_expect_success 'diff.context honored by "log"' '
 	git log -1 -p >output &&
 	test_grep ! firstline output &&
-	git config diff.context 8 &&
+	test_config diff.context 8 &&
 	git log -1 -p >output &&
 	test_grep "^ firstline" output
 '
 
 test_expect_success 'The -U option overrides diff.context' '
-	git config diff.context 8 &&
+	test_config diff.context 8 &&
 	git log -U4 -1 >output &&
 	test_grep ! "^ firstline" output
 '
 
 test_expect_success 'diff.context honored by "diff"' '
-	git config diff.context 8 &&
+	test_config diff.context 8 &&
 	git diff >output &&
 	test_grep "^ firstline" output
 '
 
 test_expect_success 'plumbing not affected' '
-	git config diff.context 8 &&
+	test_config diff.context 8 &&
 	git diff-files -p >output &&
 	test_grep ! "^ firstline" output
 '
 
 test_expect_success 'non-integer config parsing' '
-	git config diff.context no &&
+	test_config diff.context no &&
 	test_must_fail git diff 2>output &&
 	test_grep "bad numeric config value" output
 '
 
 test_expect_success 'negative integer config parsing' '
-	git config diff.context -1 &&
+	test_config diff.context -1 &&
 	test_must_fail git diff 2>output &&
 	test_grep "bad config variable" output
 '
 
 test_expect_success '-U0 is valid, so is diff.context=0' '
-	git config diff.context 0 &&
+	test_config diff.context 0 &&
 	git diff >output &&
 	test_grep "^-ADDED" output &&
 	test_grep "^+MODIFIED" output
-- 
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