Commas become un-escaped on save and reload

[ChromaticIsobar]

When saving a file with a message containing an escaped comma (\,), the comma becomes unescaped (,) when the file is reloaded.

System
Linux 5.4.0-152-lowlatency #169-Ubuntu x86_64
Pd-L2Ork version 2.17.0 (20210417-rev.ca592f6f)
compiled 21:12:53 Apr 17 2021

This issue does not affect puredata:
Pd-0.50.2 ("") compiled for Debian (0.50.2-3ubuntu0.1) on 2021/08/09 at 11:58:58 UTC

Steps to reproduce

1. Save this to file (e.g. comma.pd)

   #N canvas 813 362 450 300 12;
   #X obj 0 25 print;
   #X msg 0 0 {"hello": "world"\\\, "y": 2023};
   #X connect 1 0 0 0;
   

2. Open it with purr-data
3. Click on the message: it gets printed correctly
4. Switch to edit mode
5. Edit the message (e.g. "world" -> "worlds")
6. Switch out of edit mode
7. Click on the message: it gets printed correctly
8. Save the file
9. Close the file
10. Open the file: you should notice the comma being unescaped
11. Click on the message: it gets printed incorrectly (two separate lines)

purr-data-issue.mp4

[agraef]

Yes, I can reproduce this. Apparently somewhere on the round-trip between GUI and engine the backslash gets lost. I'll have to investigate. The relevant code is very different from vanilla Pd, because Purr's GUI is written in JavaScript, not Tcl.

[vaishnavi192]

is the issue closed? if not then plz assign to me. @ChromaticIsobar

[ChromaticIsobar]

I can still reproduce this issue in release 2.19.3

System
Linux 5.4.0-166-lowlatency #183-Ubuntu x86_64
Pd-L2Ork version 2.19.3 (20230725-rev.e9fca4f8)
compiled 11:31:29 Jul 25 2023