From 9c44060f0d9dd530a4d90c635da7b83935a1ec19 Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Tue, 9 Mar 2021 17:38:59 +0300
Subject: MathJax: get rid of the workarond

Kramdown 2.2.0 supports MathJax v3 now.
---
 README.md                              | 23 ++---------------------
 _includes/common/mathjax.html          |  8 --------
 _includes/common/mathjax_workaround.md |  1 -
 3 files changed, 2 insertions(+), 30 deletions(-)
 delete mode 100644 _includes/common/mathjax_workaround.md

diff --git a/README.md b/README.md
index 188afe8..760ae02 100644
--- a/README.md
+++ b/README.md
@@ -36,27 +36,8 @@ $$
 
 [MathJax]: https://www.mathjax.org/
 
-### GitHub workarounds
-
-MathJax version 3 is used, which is unsupported by Kramdown (which produces
-`<script type="math/tex; ..."` tags, suitable only for MathJax 2).
-This is why `math_engine` must be set to `null` in _config.yml in order to make
-Kramdown output block formulas wrapped in `$$` and inline formulas in `$`
-respectively ([inside `<span class="kdmath">` elements][kramdown issue]).
-Because if this, MathJax is additionally customized to recognize `$` as an
-inline formula delimiter in _includes/common/mathjax.html.
-
-GitHub Pages [helpfully overrides] the `math_engine` setting in your
-_config.yml, hardcoding it to `mathjax` instead of `null` (there's a related
-[pull request]).
-I couldn't find a better way than to override the setting in the markdown
-document itself using
-
-    {::options math_engine="+nil+" /}
-
-[kramdown issue]: https://github.com/gettalong/kramdown/issues/342
-[helpfully overrides]: https://help.github.com/en/articles/configuring-jekyll
-[pull request]: https://github.com/github/pages-gem/pull/644
+Behind the scenes, Kramdown transforms these to `\(...\)` and `\[...\]`
+sequences, to be processed by MathJax.
 
 History
 -------
diff --git a/_includes/common/mathjax.html b/_includes/common/mathjax.html
index 7110f57..e01e380 100644
--- a/_includes/common/mathjax.html
+++ b/_includes/common/mathjax.html
@@ -1,12 +1,4 @@
 {% if page.mathjax %}
-  <script>
-// See the README.md for explanation:
-MathJax = {
-  tex: {
-    inlineMath: [['$', '$']]
-  }
-};
-  </script>
   <script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
   <script type="text/javascript" id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-chtml.js"></script>
 {% endif %}
diff --git a/_includes/common/mathjax_workaround.md b/_includes/common/mathjax_workaround.md
deleted file mode 100644
index 9d0a77d..0000000
--- a/_includes/common/mathjax_workaround.md
+++ /dev/null
@@ -1 +0,0 @@
-{::options math_engine="+nil+" /}
-- 
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