test1/public/drupal-8.3.1/core/modules/user/templates/username.htm...

{#
/**
 * @file
 * Default theme implementation for displaying a username.
 *
 * Available variables:
 * - account: The full account information for the user.
 * - name: The user's name, sanitized.
 * - extra: Additional text to append to the user's name, sanitized.
 * - link_path: The path or URL of the user's profile page, home page,
 *   or other desired page to link to for more information about the user.
 * - link_options: Options to set on the \Drupal\Core\Url object if linking the
 *   user's name to the user's page.
 * - attributes: HTML attributes for the containing element.
 *
 * @see template_preprocess_username()
 *
 * @ingroup themeable
 */
#}
{% if link_path -%}
  <a{{ attributes }}>{{ name }}{{ extra }}</a>
{%- else -%}
  <span{{ attributes }}>{{ name }}{{ extra }}</span>
{%- endif -%}