started work on separate treatment of output delimiters:
to define as a new style variable OutDelimiters, and
to introduce number, e.g., //1+ .. //1- if the output contains //+ string, or similarly //2+ etc.
Changing opening output delimiter "\n#+\n" to "#+\n" and similarly to other styles. This is a significant change that may break some existing programs. It is an ongoing process for the other styles.
Changes in html style: numbering in delimiters, removal of newline
Changes in makefile style: numbering of delimiters, removal of a newline
Changes in python style: numbering of delimiters, removal of a newline