Custom blocks import "@" in the label as "\@"

[towerofnix]

Expected Behavior

Imported custom blocks should have "@" characters exactly as they are.

Actual Behavior

"@" characters are replaced with "\@".

I can edit the custom block and replace the "\@" with "@", so I don't think this is an issue in scratch-blocks (i.e. scratch-blocks can display "@" characters fine, the problem is they're not being imported from 2.0 projects correctly).

Steps to Reproduce

Create a 2.0 project with a custom block that has "@" in the label.

I noticed the issue in this project: https://scratch.mit.edu/projects/150986523/ (See blocks like "3d position @ x y z focal").

Operating System and Browser

Firefox 62.0b6, Debian (testing).

[Kenny2github]

note: in the post when you type \@ it appears as @ anyway lol

[towerofnix]

@Kenny2github Oops fixed :P

[joker314]

The project.json contains a \, I believe to avoid ambiguities about the @ symbol's special meaning (like @greenFlag). However, in Scratch 3.0, this doesn't appear to be done.

Based on the escape function in scratch-flash, I believe only the \, %, and @ characters are escaped, and are the only ones which need to be unescaped.