GitLab

(sgml-mode-syntax-table): Use it.
(sgml-tag-syntax-table, sgml-tag-name-re): New const.
(sgml-tags-invisible): Use it.
(sgml-lexical-context): New fun.
(sgml-maybe-end-tag, sgml-beginning-of-tag): Use it.
(sgml-quote): Accept \n as entity reference terminator.
(sgml-calculate-indent, sgml-indent-line): New funs.