auth: 41d8f972720c

Fix go vet issue. Was passing a Grant to fmt.Printf when I wanted a string. Changed to pass the code I was using to retrieve the Grant, as that turns out to be more relevant for the test, and go vet is now satisfied.

     1.1 --- a/http_test.go	Mon Nov 03 01:37:09 2014 -0500
     1.2 +++ b/http_test.go	Sun Nov 09 00:21:58 2014 -0500
     1.3 @@ -112,8 +112,8 @@
     1.4  		if red.Query().Get("code") == "" {
     1.5  			t.Fatalf(`Expected code param in redirect URL to be set, but it wasn't for %s`, req.URL.String())
     1.6  		}
     1.7 -		if grant, err := testContext.GetGrant(red.Query().Get("code")); err != nil {
     1.8 -			t.Fatalf(`Unexpected error "%s: retrieving the grant "%s" supplied in the redirect URL for %s`, err, grant, req.URL.String())
     1.9 +		if _, err := testContext.GetGrant(red.Query().Get("code")); err != nil {
    1.10 +			t.Fatalf(`Unexpected error "%s: retrieving the grant "%s" supplied in the redirect URL for %s`, err, red.Query().Get("code"), req.URL.String())
    1.11  		}
    1.12  		err = testContext.DeleteGrant(red.Query().Get("code"))
    1.13  		if err != nil {