+ *
+ * @param array $args {
+ * Optional. Default arguments and form fields to override.
+ *
+ * @type array 'fields' {
+ * Default comment fields, filterable by default via the 'comment_form_default_fields' hook.
+ *
+ * @type string 'author' The comment author field HTML.
+ * @type string 'email' The comment author email field HTML.
+ * @type string 'url' The comment author URL field HTML.
+ * }
+ * @type string 'comment_field' The comment textarea field HTML.
+ * @type string 'must_log_in' HTML element for a 'must be logged in to comment' message.
+ * @type string 'logged_in_as' HTML element for a 'logged in as <user>' message.
+ * @type string 'comment_notes_before' HTML element for a message displayed before the comment form.
+ * Default 'Your email address will not be published.'.
+ * @type string 'comment_notes_after' HTML element for a message displayed after the comment form.
+ * Default 'You may use these HTML tags and attributes ...'.
+ * @type string 'id_form' The comment form element id attribute. Default 'commentform'.
+ * @type string 'id_submit' The comment submit element id attribute. Default 'submit'.
+ * @type string 'title_reply' The translatable 'reply' button label. Default 'Leave a Reply'.
+ * @type string 'title_reply_to' The translatable 'reply-to' button label. Default 'Leave a Reply to %s',
+ * where %s is the author of the comment being replied to.
+ * @type string 'cancel_reply_link' The translatable 'cancel reply' button label. Default 'Cancel reply'.
+ * @type string 'label_submit' The translatable 'submit' button label. Default 'Post a comment'.
+ * @type string 'format' The comment form format. Default 'xhtml'. Accepts 'xhtml', 'html5'.
+ * }
+ * @param int|WP_Post $post_id Optional. Post ID or WP_Post object to generate the form for. Default current post.