test: maybe fix Windows?

main_test.go

@@ -109,6 +109,14 @@ func expectAreEqual(t *testing.T, subject, actual, expect string) {
 	}
 }
 
+func TestMain(m *testing.M) {
+	m.Run()
+
+	for _, f := range filesToCleanup {
+		os.Remove(f)
+	}
+}
+
 func testCli(t *testing.T, tc cliTestCase) {
 	t.Helper()
 
@@ -1378,6 +1386,8 @@ func TestRun_Ignores(t *testing.T) {
 	}
 }
 
+var filesToCleanup []string
+
 func setupConfigForUpdating(t *testing.T, path string, initial string, updated string) func() {
 	t.Helper()
 
@@ -1387,6 +1397,8 @@ func setupConfigForUpdating(t *testing.T, path string, initial string, updated s
 		t.Fatalf("could not create test file: %v", err)
 	}
 
+	filesToCleanup = append(filesToCleanup, path)
+
 	return func() {
 		t.Helper()