docs: use the term backend name instead of fs name for authorize command

cmd/authorize/authorize.go

@@ -23,7 +23,7 @@ func init() {
 }
 
 var commandDefinition = &cobra.Command{
-	Use:   "authorize <fs name> [base64_json_blob | client_id client_secret]",
+	Use:   "authorize <backendname> [base64_json_blob | client_id client_secret]",
 	Short: `Remote authorization.`,
 	Long: `Remote authorization. Used to authorize a remote or headless
 rclone from a machine with a browser - use as instructed by
@@ -31,7 +31,7 @@ rclone config.
 
 The command requires 1-3 arguments:
 
-- fs name (e.g., "drive", "s3", etc.)
+- Name of a backend (e.g. "drive", "s3")
 - Either a base64 encoded JSON blob obtained from a previous rclone config session
 - Or a client_id and client_secret pair obtained from the remote service
 

cmd/authorize/authorize_test.go

@@ -10,7 +10,7 @@ import (
 
 func TestAuthorizeCommand(t *testing.T) {
 	// Test that the Use string is correctly formatted
-	if commandDefinition.Use != "authorize <fs name> [base64_json_blob | client_id client_secret]" {
+	if commandDefinition.Use != "authorize <backendname> [base64_json_blob | client_id client_secret]" {
 		t.Errorf("Command Use string doesn't match expected format: %s", commandDefinition.Use)
 	}
 
@@ -26,7 +26,7 @@ func TestAuthorizeCommand(t *testing.T) {
 	}
 
 	helpOutput := buf.String()
-	if !strings.Contains(helpOutput, "authorize <fs name>") {
+	if !strings.Contains(helpOutput, "authorize <backendname>") {
 		t.Errorf("Help output doesn't contain correct usage information")
 	}
 }