Re: emacs rendering comparisson between emacs23 and emacs26.3

[Stefan Monnier]

>> It can be done reliably, but it would most likely want help from the
>> major mode (e.g. the C syntax tables give the syntax of strings but
>> don't indicate that those strings are not allowed to span multiple
>> lines).
> How about adding support to the syntax table?

I don't know of any language that defines strings this way, so I'd
rather not.

[ Furthermore, I think there are too many subtly different ways to
  (dis)allow multiline strings in programming languages, so handling it
  in something like `syntax-propertize` is preferable at least until we
  have a firm grasp of what is the design space.  ]

It's OK to try and detect the situation and highlight it as an error,
but that's quite different from defining it as "the official syntax".


        Stefan