Docs update

Author: tzununbekov

README.md

@@ -207,12 +207,12 @@ While using a username as a registry identifier (docker.io/username) is a common
 
 ```
 TOKEN=$(gcloud auth print-access-token)
-tm set registry-auth gcr --registry eu.gcr.io --username oauth2accesstoken --project foo --password $TOKEN
+tm set registry-auth gcr --registry eu.gcr.io --project my-org/my-project --username oauth2accesstoken --password $TOKEN
 tm generate python
 tm deploy -f python --registry-secret gcr --wait
 ```
 
-As a result, Knative service image will be pushed to `eu.gcr.io/foo/` registry
+As a result, Knative service image will be pushed to `eu.gcr.io/my-org/my-project` registry
 
 
 #### Unauthenticated registry

cmd/set.go

@@ -49,7 +49,7 @@ func cmdSetRegistryCreds(clientset *client.ConfigSet) *cobra.Command {
 	}
 
 	setRegistryCredsCmd.Flags().StringVar(&rc.Host, "registry", "", "Registry host address")
-	setRegistryCredsCmd.Flags().StringVar(&rc.ProjectID, "project", "", "If set, use this value instead of the username in image URL: <host>/<project>/<image>")
+	setRegistryCredsCmd.Flags().StringVar(&rc.ProjectID, "project", "", "If set, use this value instead of the username in image names. Example: gcr.io/<project>")
 	setRegistryCredsCmd.Flags().StringVar(&rc.Username, "username", "", "Registry username")
 	setRegistryCredsCmd.Flags().StringVar(&rc.Password, "password", "", "Registry password")
 	setRegistryCredsCmd.Flags().BoolVar(&rc.Pull, "pull", false, "Indicates if this token must be used for pull operations only")