$ character starts latex mode even inside fenced block

[jrvarma]

When using poly-markdown, the $ character starts LaTex mode even inside fenced block. In a fenced block the $ character is just a literal character and should not start LaTex mode.

I am using poly-markdown-0.1.5 and emacs 26.1

[vspinu]

This one is a bad one. I don't know how to fix this generically without complicating the span logic by a huge extent. I guess I will just restrict the markdown math span to single lines for now.

[vspinu]

Ok. I figured out a simple solutions. Thanks for reporting this.

[jrvarma]

Could you please push this into Melpa Stable or at least into Melpa. If this is not likely to happen soon, then I can try installing manually using git clone.

[vspinu]

It's always on Melpa. I will tag for Melpa Stable tomorrow.

[jrvarma]

Problem persists after upgrading polymode, poly-markdown, poly-R and poly-noweb to 0.2 from Melpa Stable.

Minimal working example of the problem is

echo $PATH

• As I type echo $PATH inside the fenced block in a markdown file, polymode switches the buffer mode from Markdown PM to LaTex/P PM as soon as I type the $.
• It will come back to Markdown PM if I type another $ without any intervening spaces or new line (say echo $PATH$)
• But if instead I start a new line and I type a $ on the new line (say, echo $HOME), it does not return to Markdown PM.
• The result is that after one line in a fenced block containing a single $, the buffer remains in LaTex/P PM mode till the end of the file regardless of how many more $'s it contains.

I have confirmed this behaviour with emacs -Q after running the following in a scratch buffer

(require 'package)
(package-initialize nil)

[vspinu]

This is only in unnamed blocks right? In named ones things behave as expected right?

[jrvarma]

Absolutely. Never thought that just naming the block would solve the problem!

[vspinu]

The unnamed blocks (aka those without an explicit mode) are not treated by polymode in any special way. This is why you get this results. Fixing this is a bit tricky mostly for reasons described in #9 but should be possible after the recent core rewrite.

[jrvarma]

Using an explicit mode is good practice in any case, and also makes editing the block in emacs easier. If nothing else, one can always use text as the mode. I am happy with the current solution.

Thanks again for a wonderful emacs package.

[jcubic]

I have a similar issue with $( inside JavaScript code block, with latest version from Melpa. See linked issue:

• LaTeX mode creeps in when using JavaScript code snippets #29