[AUCTeX-devel] $$-->\begin{displaymath}

[Uwe Brauer]

Hi

I am not sure whether I brought up this subject some time ago, I tried
to google but couldn't find anything. Be it as it may, is my
understanding that the Tex construct.


$$
\int dx =0
$$

Should be avoided and replaced by say
\begin{displaymath}
\int dx =0
\end{displaymath}

Here is a small function which does this, I am however not sure how to
deal with newlines, for example how to deal with this construct

$$ \int dx =0 $$

ideal would be to turn it into 
\begin{displaymath}
\int dx =0
\end{displaymath}

But all the solutions I found also turn
\begin{displaymath}
\int dx =0
\end{displaymath}

Into

\begin{displaymath}

\int dx =0

\end{displaymath}

Which is not good

(defun my-change-dollar-to-displaymath ()
  (interactive)
  (replace-regexp "\\$\\$\\(\\(.\\|\n\\)*?\\)\\$\\$"
                  "\\\\begin{displaymath}\\1\\\\end{displaymath}"))


Regards

Uwe Brauer