Add support for italic capital Greek letters

[mormegil-cz]

There is currently no way to write a bold italic capital Greek letter (e.g. for angular velocity vector).

The easiest way to achieve this in Math/MathJax is to use \boldsymbol \varOmega which is already supported by MathJax, but it is not recognized by texvc, so it is rejected.

This commit adds all symbols for capital Greek variables (varDelta, \varOmega, ...) supported by MathJax (see https://docs.mathjax.org/en/latest/tex.html#v) to the list of supported macros.

[physikerwelt]

Thank you for the pull request. However, there are two issues.

1. We need test cases
2. This is a change in syntax. Therefore it needs community support. You can ask this group https://phabricator.wikimedia.org/T195861 for feedback

[physikerwelt]

I think it would also be a good idea to have some visual tests before we deploy this.

Currently, we have 92 visual test cases at
https://github.com/wikimedia/mathoid/blob/master/test/files/mathjax-texvc/test.md
these tests are automatically generated via
https://github.com/wikimedia/mathoid/blob/master/scripts/imgUpdate.js
to generate these test cases you'll have to overwrite the dependency to texvcjs here
https://github.com/wikimedia/mathoid/blob/master/package.json#L41

Let me know if you run into trouble... documentation is really a problem.

[mormegil-cz]

Submitted patch to add tests: https://gerrit.wikimedia.org/r/c/mediawiki/services/mathoid/+/514785

[physikerwelt]

2\. This is a change in syntax. Therefore it needs community support. You can ask this group https://phabricator.wikimedia.org/T195861 for feedback

I did that via http://openmath.org/pipermail/wiki-l/2019-August/000000.html

[mormegil-cz]

Otherwise, I will merge the PR after August 26th, 2019

So… ?

[physikerwelt]

@d00rman how do we proceed here. Should I just release a new texvcjs version to npm?

[d00rman]

@d00rman how do we proceed here. Should I just release a new texvcjs version to npm?

Yup, but there is no version bump in this PR. @mormegil-cz could you bump the version in package.json to 0.3.7 please?

[mormegil-cz]

Version bumped. (Even though I’m not sure this is the best process – shouldn’t release management be separate to individual feature PRs? Not that it would matter much, of course.)

[physikerwelt]

@mormegil-cz this is now on npm however, the gerrit change needs to point to the latest texvcinfo version, which is 0.5.4.