Checking in vendor folder for ease of using go get.

vendor/golang.org/x/text/width/example_test.go

@@ -0,0 +1,52 @@
+// 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 width_test
+
+import (
+	"fmt"
+
+	"golang.org/x/text/width"
+)
+
+func ExampleTransformer_fold() {
+	s := "abｦ￦￮￥Ａ"
+	f := width.Fold.String(s)
+	fmt.Printf("%U: %s\n", []rune(s), s)
+	fmt.Printf("%U: %s\n", []rune(f), f)
+
+	// Output:
+	// [U+0061 U+0062 U+FF66 U+FFE6 U+FFEE U+FFE5 U+FF21]: abｦ￦￮￥Ａ
+	// [U+0061 U+0062 U+30F2 U+20A9 U+25CB U+00A5 U+0041]: abヲ₩○¥A
+}
+
+func ExampleTransformer_widen() {
+	s := "ab¥ｦ₩￮"
+	w := width.Widen.String(s)
+	fmt.Printf("%U: %s\n", []rune(s), s)
+	fmt.Printf("%U: %s\n", []rune(w), w)
+
+	// Output:
+	// [U+0061 U+0062 U+00A5 U+FF66 U+20A9 U+FFEE]: ab¥ｦ₩￮
+	// [U+FF41 U+FF42 U+FFE5 U+30F2 U+FFE6 U+25CB]: ａｂ￥ヲ￦○
+}
+
+func ExampleTransformer_narrow() {
+	s := "abヲ￦○￥Ａ"
+	n := width.Narrow.String(s)
+	fmt.Printf("%U: %s\n", []rune(s), s)
+	fmt.Printf("%U: %s\n", []rune(n), n)
+
+	// Ambiguous characters with a halfwidth equivalent get mapped as well.
+	s = "←"
+	n = width.Narrow.String(s)
+	fmt.Printf("%U: %s\n", []rune(s), s)
+	fmt.Printf("%U: %s\n", []rune(n), n)
+
+	// Output:
+	// [U+0061 U+0062 U+30F2 U+FFE6 U+25CB U+FFE5 U+FF21]: abヲ￦○￥Ａ
+	// [U+0061 U+0062 U+FF66 U+20A9 U+FFEE U+00A5 U+0041]: abｦ₩￮¥A
+	// [U+2190]: ←
+	// [U+FFE9]: ￩
+}