ccollins476ad commented on issue #55: MYNEWT-583; newt - allow use of specific 
tag/repository revision.
URL: 
https://github.com/apache/incubator-mynewt-newt/pull/55#issuecomment-305100811
 
 
   Btw, I figured out why my playground example wasn't working.  The String() 
function operated on a `*S`, but I was passing a plain `S` to Printf.  I 
updated the example code and now it does work 
(https://play.golang.org/p/4kMNJ8NdEB):
   
   ```
   package main
   
   import (
        "fmt"
   )
   
   type S struct {
        a int
   }
   
   func (s *S) String() string {
        return fmt.Sprintf("%d", s.a)
   }
   
   func main() {
        s := &S{5}
        fmt.Printf("s=%s\n", s)
   }
   ```
   
   ```
   s=5
   
   Program exited.
   ```
 
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