title: main.go:9: use of package str without selector
body: <p>I have the following in the intepreter of Tour of Go:</p>
  
  <pre><code>package main
  
  import (
      "golang.org/x/tour/wc"
      str "strings"
  )
  
  func WordCount(s string) map[string]int {
      results := make(map[str]int)
      words := str.Fields(s)
      return map[string]int{"x": 1}
  }
  
  //func main() {
  //  wc.Test(WordCount)
  //}
  </code></pre>
  
  <p>This is based on <a href="https://tour.golang.org/moretypes/23" rel="nofollow noreferrer">https://tour.golang.org/moretypes/23</a></p>
  
  <p>My error is </p>
  
  <pre><code>tmp/sandbox169629521/main.go:9: use of package str without selector
  </code></pre>
  
  <p>Trying</p>
  
  <pre><code>results := make(map[str.string]int)
  </code></pre>
  
  <p>now fails with</p>
  
  <pre><code>tmp/sandbox424441423/main.go:9: cannot refer to unexported name strings.string
  tmp/sandbox424441423/main.go:9: undefined: strings.string
  </code></pre>