[PATCH] Startup option to separate macros arguments with an alternative string

[Juan Manuel Macías]

Hi,

I would like to propose this (possible) patch.

With `#+STARTUP: macro-arg-sep-other' the macros arguments can be
separated by a string other than comma, whose value is defined in
`org-macro-arg-sep-other' (by default it is "'@").

Rationale for this patch: There are many contexts where the comma character can 
be
inappropriate as an argument separator, since it has to be escaped many times.

If the patch is relevant, I can take care of writing the documentation and 
docstrings.

Example:

#+begin_src org
  ,#+STARTUP: macro-arg-sep-other
  ,#+MACRO: lg (eval (if (org-export-derived-backend-p 
org-export-current-backend 'latex) (concat "@@latex:\\foreignlanguage{@@" $1 
"@@latex:}{@@" "\u200B" $2 "\u200B" "@@latex:}@@") $2))

  {{{lg(latin'@Lorem ipsum dolor sit amet, consectetuer adipiscing elit, donec 
hendrerit
  tempor tellus, donec pretium posuere tellus, proin quam nisl, tincidunt et, 
mattis eget,
  convallis nec, purus.)}}}

  With the escaped character:

 {{{lg(latin'@Lorem ipsum dolor sit amet \'@)}}}
#+end_src

Best regards,

Juan Manuel

org-macro-arg-sep.patch
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