org-export-with-fixed-width

org-export-with-fixed-width is a variable defined in `ox.el'.
Its value is

t

Documentation:
Non-nil means lines starting with ":" will be in fixed width font.

This can be used to have pre-formatted text, fragments of code
etc. For example:
: ;; Some Lisp examples
: (while (defc cnt)
: (ding))
will be looking just like this in also HTML. See also the QUOTE
keyword. Not all export backends support this.

This option can also be set with the OPTIONS keyword,
e.g. "::nil".

You can customize this variable.