Automattic / jetpack

				$error = '';

				$activated_count = count( $activated );

				if ( $activated_count > 0 ) {

					$activated_last = array_pop( $activated );

					$activated_text = $activated_count > 1 ? sprintf(

						/* Translators: first variable is a list followed by a last item. Example: dog, cat and bird. */

						__( '%s and %s', 'jetpack' ),

						join( ', ', $activated ), $activated_last ) : $activated_last;

					$error = sprintf(

						/* Translators: the plural variable is a list followed by a last item. Example: dog, cat and bird. */

						_n( 'The module %s was activated.', 'The modules %s were activated.', $activated_count, 'jetpack' ),

						$activated_text ) . ' ';

				}

				$failed_count = count( $failed );

				if ( count( $failed ) > 0 ) {

				}

				$failed_count = count( $failed );

				if ( count( $failed ) > 0 ) {

					$failed_last = array_pop( $failed );

					$failed_text = $failed_count > 1 ? sprintf(

						/* Translators: first variable is a list followed by a last item. Example: dog, cat and bird. */

						__( '%s and %s', 'jetpack' ),

						join( ', ', $failed ), $failed_last ) : $failed_last;

					$error = sprintf(

						/* Translators: the plural variable is a list followed by a last item. Example: dog, cat and bird. */

						_n( 'The module %s failed to be activated.', 'The modules %s failed to be activated.', $failed_count, 'jetpack' ),

						$failed_text ) . ' ';

				}

			}

			return new WP_Error( 'activation_failed', esc_html( $error ), array( 'status' => 424 ) );

		}