refactor: Logs & errors review.

- log & error: remove format if not necessary, add if necessary.
- add constants for k8s annotations.
- fix typos

cmd/traefik/bug.go

@@ -118,7 +118,7 @@ func newBugCmd(traefikConfiguration interface{}, traefikPointersConfiguration in
 			body := bug.String()
 			URL := bugtracker + "?body=" + url.QueryEscape(body)
 			if err := openBrowser(URL); err != nil {
-				fmt.Print("Please file a new issue at " + bugtracker + " using this template:\n\n")
+				fmt.Printf("Please file a new issue at %s using this template:\n\n", bugtracker)
 				fmt.Print(body)
 			}
 

cmd/traefik/version.go

@@ -30,7 +30,7 @@ func newVersionCmd() *flaeg.Command {
 			if err := getVersionPrint(os.Stdout); err != nil {
 				return err
 			}
-			fmt.Printf("\n")
+			fmt.Print("\n")
 			return nil
 
 		},