Fix parenthesis auto selection

[missionfloyd]

Fixes #13813

Checklist:

• I have read contributing wiki page
• I have performed a self-review of my own code
• My code follows the style guidelines
• My code passes tests

[catboxanon]

Probably should take a look at the case in #13533 (comment) because this still doesn't resolve that, with or without this change.

test <lora:name:1> doesn't function correctly when attempting to edit test as well.

[AUTOMATIC1111]

this was a bug by me, thanks

catboxanon:
test <lora:name:1> asdsadgvsacasdcsdf seems to work just fine for me - becomes (test:1.1) <lora:name:1> asdsadgvsacasdcsdf

[catboxanon]

@AUTOMATIC1111 I should've specified I'm not manually selecting the text, just placing the cursor there. This is the behavior I'm getting. With all extensions disabled and on latest dev commit. I have to revert back to https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/0b0767939d4cc0868a10b6c0978f7b2d963dea1a/javascript/edit-attention.js to get it to work properly.

firefox_2023-11-03_13-53-07.mp4

[catboxanon]

Oh, it's my delimiters that weren't updated as part of 1cc7c4b ...
That's going to need a compatibility update here so it overwrites the setting if the user never modified it.

Edit: For the record, assigning it with the raw string didn't even work properly, and it ended up writing a literal \ followed by n for example. I had to manually modify the config.json. The way that ends up displaying in the settings interface isn't really clear at all though.