Checking in vendor folder for ease of using go get.

vendor/golang.org/x/text/internal/testtext/flag.go

@@ -0,0 +1,22 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package testtext
+
+import (
+	"flag"
+	"testing"
+
+	"golang.org/x/text/internal/gen"
+)
+
+var long = flag.Bool("long", false,
+	"run tests that require fetching data online")
+
+// SkipIfNotLong returns whether long tests should be performed.
+func SkipIfNotLong(t *testing.T) {
+	if testing.Short() || !(gen.IsLocal() || *long) {
+		t.Skip("skipping test to prevent downloading; to run use -long or use -local or UNICODE_DIR to specify a local source")
+	}
+}