I think this is done!

This problems are not logner valid because the changes in the skin and more in general in the ui. There are some other bugs which needs to be fixed, but I would simply open another ticket instead of using this one.

this was fixed with great style by @crisbal

I built the Visual Editor gadgets.

the bot is ready, we need only to use it when is needed, right?

this is fixed?

did I answer you enough on the chat?

I'm writing the bot.

The gadget for visual editor seems to me the best options. We have not a real alternative I think.

I can understand your fear but I think this is still the best option we found when we were choosing what to do with templates. My idea would be to extend visual editor with a gadget listing all the main templates, so when a user choose to insert a predefined template the opening template and closing one are automatically inserted (I don't know if it possible though).

I would like to reopen this task and discuss it a little bit further.
if we implement the solution number 3, this would require instructing the editors about remembering to close the tag (and this requiring the editor to double interact with VE interface).

All the dmath tags have been removed from the production website.

Seems like I can't reproduce the bug anymore :/

Check if code editor is working correctly:
I found that if insert a new formula it shows you a big textarea where you can write. If you save it and then redit that formula, the textarea become just 2 rows large.

Just to confirm, the bot will be able to work without requiring an atomic change, i.e. pages can be converted one by one, as backwards compatibility has been preserved.

The solution #3 has been implemented, so you would write something like this, for example: