Merge branch 'rt/commit-cleanup-config'

Fix tests that contaminated their environments and affected new
tests introduced later in the sequence by containing their effects
in their own subshells.

* rt/commit-cleanup-config:
  t7502: perform commits using alternate editor in a subshell

Author: gitster

t/t7502-commit.sh

@@ -263,32 +263,40 @@ test_expect_success 'cleanup commit message (fail on invalid cleanup mode config
 test_expect_success 'cleanup commit message (no config and no option uses default)' '
 	echo content >>file &&
 	git add file &&
-	test_set_editor "$TEST_DIRECTORY"/t7500/add-content-and-comment &&
-	git commit --no-status &&
+	(
+	  test_set_editor "$TEST_DIRECTORY"/t7500/add-content-and-comment &&
+	  git commit --no-status
+	) &&
 	commit_msg_is "commit message"
 '
 
 test_expect_success 'cleanup commit message (option overrides default)' '
 	echo content >>file &&
 	git add file &&
-	test_set_editor "$TEST_DIRECTORY"/t7500/add-content-and-comment &&
-	git commit --cleanup=whitespace --no-status &&
+	(
+	  test_set_editor "$TEST_DIRECTORY"/t7500/add-content-and-comment &&
+	  git commit --cleanup=whitespace --no-status
+	) &&
 	commit_msg_is "commit message # comment"
 '
 
 test_expect_success 'cleanup commit message (config overrides default)' '
 	echo content >>file &&
 	git add file &&
-	test_set_editor "$TEST_DIRECTORY"/t7500/add-content-and-comment &&
-	git -c commit.cleanup=whitespace commit --no-status &&
+	(
+	  test_set_editor "$TEST_DIRECTORY"/t7500/add-content-and-comment &&
+	  git -c commit.cleanup=whitespace commit --no-status
+	) &&
 	commit_msg_is "commit message # comment"
 '
 
 test_expect_success 'cleanup commit message (option overrides config)' '
 	echo content >>file &&
 	git add file &&
-	test_set_editor "$TEST_DIRECTORY"/t7500/add-content-and-comment &&
-	git -c commit.cleanup=whitespace commit --cleanup=default &&
+	(
+	  test_set_editor "$TEST_DIRECTORY"/t7500/add-content-and-comment &&
+	  git -c commit.cleanup=whitespace commit --cleanup=default
+	) &&
 	commit_msg_is "commit message"
 '