t7508: use test_config to set/unset git config variables

Instead of using construct such as:
    test_when_finished "git config --unset <key>"
    git config <key> <value>
uses
    test_config <key> <value>
The latter takes care of removing <key> at the end of the test.

Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t7508-status.sh

@@ -130,8 +130,7 @@ cat >expect <<\EOF
 EOF
 
 test_expect_success 'status (advice.statusHints false)' '
-	test_when_finished "git config --unset advice.statusHints" &&
+	test_config advice.statusHints false &&
-	git config advice.statusHints false &&
 	git status >output &&
 	test_i18ncmp expect output
 
@@ -331,8 +330,7 @@ test_expect_success 'status -uno' '
 '
 
 test_expect_success 'status (status.showUntrackedFiles no)' '
-	git config status.showuntrackedfiles no
+	test_config status.showuntrackedfiles no &&
-	test_when_finished "git config --unset status.showuntrackedfiles" &&
 	git status >output &&
 	test_i18ncmp expect output
 '
@@ -347,12 +345,11 @@ cat >expect <<EOF
 #
 # Untracked files not listed
 EOF
-git config advice.statusHints false
 test_expect_success 'status -uno (advice.statusHints false)' '
+	test_config advice.statusHints false &&
 	git status -uno >output &&
 	test_i18ncmp expect output
 '
-git config --unset advice.statusHints
 
 cat >expect << EOF
  M dir1/modified
@@ -399,8 +396,7 @@ test_expect_success 'status -unormal' '
 '
 
 test_expect_success 'status (status.showUntrackedFiles normal)' '
-	git config status.showuntrackedfiles normal
+	test_config status.showuntrackedfiles normal
-	test_when_finished "git config --unset status.showuntrackedfiles" &&
 	git status >output &&
 	test_i18ncmp expect output
 '
@@ -458,8 +454,7 @@ test_expect_success 'status -uall' '
 '
 
 test_expect_success 'status (status.showUntrackedFiles all)' '
-	git config status.showuntrackedfiles all
+	test_config status.showuntrackedfiles all
-	test_when_finished "git config --unset status.showuntrackedfiles" &&
 	git status >output &&
 	test_i18ncmp expect output
 '
@@ -484,10 +479,9 @@ test_expect_success 'status -s -uall' '
 	test_cmp expect output
 '
 test_expect_success 'status -s (status.showUntrackedFiles all)' '
-	git config status.showuntrackedfiles all
+	test_config status.showuntrackedfiles all &&
 	git status -s >output &&
 	rm -rf dir3 &&
-	git config --unset status.showuntrackedfiles &&
 	test_cmp expect output
 '
 
@@ -587,15 +581,13 @@ cat >expect <<\EOF
 EOF
 
 test_expect_success 'status with color.ui' '
-	git config color.ui always &&
+	test_config color.ui always &&
-	test_when_finished "git config --unset color.ui" &&
 	git status | test_decode_color >output &&
 	test_i18ncmp expect output
 '
 
 test_expect_success 'status with color.status' '
-	git config color.status always &&
+	test_config color.status always &&
-	test_when_finished "git config --unset color.status" &&
 	git status | test_decode_color >output &&
 	test_i18ncmp expect output
 '
@@ -719,8 +711,7 @@ EOF
 
 test_expect_success 'status without relative paths' '
 
-	git config status.relativePaths false &&
+	test_config status.relativePaths false &&
-	test_when_finished "git config --unset status.relativePaths" &&
 	(cd dir1 && git status) >output &&
 	test_i18ncmp expect output
 
@@ -739,8 +730,7 @@ EOF
 
 test_expect_success 'status -s without relative paths' '
 
-	git config status.relativePaths false &&
+	test_config status.relativePaths false &&
-	test_when_finished "git config --unset status.relativePaths" &&
 	(cd dir1 && git status -s) >output &&
 	test_cmp expect output
 
@@ -1037,15 +1027,14 @@ test_expect_success '--ignore-submodules=untracked suppresses submodules with un
 '
 
 test_expect_success '.gitmodules ignore=untracked suppresses submodules with untracked content' '
-	git config diff.ignoreSubmodules dirty &&
+	test_config diff.ignoreSubmodules dirty &&
 	git status >output &&
 	test_i18ncmp expect output &&
 	git config --add -f .gitmodules submodule.subname.ignore untracked &&
 	git config --add -f .gitmodules submodule.subname.path sm &&
 	git status >output &&
 	test_i18ncmp expect output &&
-	git config -f .gitmodules  --remove-section submodule.subname &&
+	git config -f .gitmodules  --remove-section submodule.subname
-	git config --unset diff.ignoreSubmodules
 '
 
 test_expect_success '.git/config ignore=untracked suppresses submodules with untracked content' '
@@ -1065,15 +1054,14 @@ test_expect_success '--ignore-submodules=dirty suppresses submodules with untrac
 '
 
 test_expect_success '.gitmodules ignore=dirty suppresses submodules with untracked content' '
-	git config diff.ignoreSubmodules dirty &&
+	test_config diff.ignoreSubmodules dirty &&
 	git status >output &&
 	! test -s actual &&
 	git config --add -f .gitmodules submodule.subname.ignore dirty &&
 	git config --add -f .gitmodules submodule.subname.path sm &&
 	git status >output &&
 	test_i18ncmp expect output &&
-	git config -f .gitmodules  --remove-section submodule.subname &&
+	git config -f .gitmodules  --remove-section submodule.subname
-	git config --unset diff.ignoreSubmodules
 '
 
 test_expect_success '.git/config ignore=dirty suppresses submodules with untracked content' '
@@ -1290,15 +1278,13 @@ cat > expect << EOF
 EOF
 
 test_expect_success "status (core.commentchar with submodule summary)" '
-	test_when_finished "git config --unset core.commentchar" &&
+	test_config core.commentchar ";" &&
-	git config core.commentchar ";" &&
 	git status >output &&
 	test_i18ncmp expect output
 '
 
 test_expect_success "status (core.commentchar with two chars with submodule summary)" '
-	test_when_finished "git config --unset core.commentchar" &&
+	test_config core.commentchar ";;" &&
-	git config core.commentchar ";;" &&
 	git status >output &&
 	test_i18ncmp expect output
 '