A physical line break in the text, optionally with explicit line numbering, added by the editor which the inscriber of the text has either omitted or for which he has by error inscribed something else. Standard newline characters are not evaluated as valid line breaks to allow for laxity and tolerance towards editorial typos.
A single number sign # optionally followed by a natural number for explicit line numbering, all enclosed within the dollar-sign wrapper $…$ and wrapped by angle brackets <…>.
A single slash / optionally followed by a natural number for explicit line numbering, all enclosed within the dollar-sign wrapper $…$ and wrapped by angle brackets <…>.