Add missing t.Helper()

I noticed over in cockroachdb/cockroach that test failures were printed as originating from `datadriven.go:194` as opposed to the actual test's invocation of `datadriven.RunTest`. Inserting the missing `t.Helper()` call seems to have fixed that.
cockroachdb · Aug 26, 2020 · d0c8fd6 · d0c8fd6
1 parent c9e8355
commit d0c8fd6
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/datadriven.go b/datadriven.go
@@ -188,6 +188,7 @@ func runDirectiveOrSubTest(
 	mandatorySubTestPrefix string,
 	f func(*testing.T, *TestData) string,
 ) {
+	t.Helper()
 	if subTestName, ok := isSubTestStart(t, r, mandatorySubTestPrefix); ok {
 		runSubTest(subTestName, t, r, f)
 	} else {