code review 6589070: go-tour: add copyright notices

gotour/solutions/maps.go

+// Copyright 2012 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 main
 
 import (
         "strings"
         "tour/wc"
 )
 
 func WordCount(s string) map[string]int {
         m := make(map[string]int)
         for _, f := range strings.Fields(s) {
                 m[f]++
         }
         return m
 }
 
 func main() {
         wc.Test(WordCount)
 }