\mathscr{I} renders incorrectly

[amalikmichael]

Issue Summary

\mathscr{I} renders incorrectly. In fact, \mathscr{I} renders the exact same symbol as \mathscr{J}

Steps to Reproduce:

1. Reproducible on official live demo: https://www.mathjax.org/#demo
2. Typing \(\mathscr{IJ}\) renders the same symbol twice

Same issue with \scr{I}. Same bug occurs on my machine.

Technical details:

• MathJax Version: 3
• Client OS: Mac OS X 10.15.7
• Browser: Safari 14.0 as well as Chrome 86.0.4240.75

[zorkow]

Thanks for finding that.
Script I (unicode 2110) seems to be mapped to script J (unicode 1D4A5).
Branch issue2555 contains a fix for the CHTML renderer.
The SVG renderer contains the wrong path. @dpvc can you have a look at that, please?

[dpvc]

I've finally had the chance to update the data files for this, and have made a PR for it.