go & ruby: Add trailing newline to response

Just for convenience. Before (e.g. for go):

    kirr@teco:~$ curl http://[::1]:7778
    Hello world at `/`  ; Thu Jun  9 11:09:49 2016  (go)kirr@teco:~$

After:

    kirr@teco:~$ curl http://[::1]:7778
    Hello world at `/`  ; Thu Jun  9 11:10:36 2016  (go)
    kirr@teco:~$

Python version already emits trailing newline, because it uses `print ...`
without trailing ",".

/reviewed-by TrustMe

go/helloweb.go

@@ -29,7 +29,7 @@ func logit(handler http.Handler) http.Handler {
 var name string
 
 func webhello(w http.ResponseWriter, r *http.Request) {
-	fmt.Fprintf(w, "Hello %s at `%s`  ; %s  (go)", name,
+	fmt.Fprintf(w, "Hello %s at `%s`  ; %s  (go)\n", name,
 		r.URL.Path, asctime())
 }
 

ruby/helloweb.rb

@@ -41,7 +41,7 @@ def main
     httpd.mount_proc '/' do |req, resp|
         name = args.argv_extra.join(' ')
         name = 'world' if name.empty?
-        resp.body = "Hello #{name} at `#{req.path}`  ; #{Time.now.asctime}  (ruby)"
+        resp.body = "Hello #{name} at `#{req.path}`  ; #{Time.now.asctime}  (ruby)\n"
     end
 
     httpd.start