Update the mathjax version to fix the \vec{} rendering in Safari (#919)

* update the mathjax version to fix shifted \vec{}

* add spaces

---------

Co-authored-by: Aliya Nigamova <aliyanigamova@eduroam-2946.desy.de>

Author: anigamova

docs/javascripts/mathjax.js

@@ -0,0 +1,19 @@
+window.MathJax = {
+  tex: {
+    inlineMath: [["\\(", "\\)"]],
+    displayMath: [["\\[", "\\]"]],
+    processEscapes: true,
+    processEnvironments: true
+  },
+  options: {
+    ignoreHtmlClass: ".*|",
+    processHtmlClass: "arithmatex"
+  }
+};
+
+document$.subscribe(() => { 
+  MathJax.startup.output.clearCache()
+  MathJax.typesetClear()
+  MathJax.texReset()
+  MathJax.typesetPromise()
+})

docs/what_combine_does/model_and_likelihood.md

@@ -295,8 +295,8 @@ However, some constraints do exist, such as the requirement that bin contents be
 The auxiliary constraint terms implemented in combine are Gaussian, Poisson or Uniform:
 
 $$
-p_{e} \propto \exp{\left(-0.5 \left(\frac{(\nu_{e} - y_{e})}{\sigma}\right)^2 \right)}\mathrm{;} \\
-p_{e} = \mathrm{Poiss}( \nu_{e}; y_{e} ) \mathrm{;\ or} \\
+p_{e} \propto \exp{\left(-0.5 \left(\frac{(\nu_{e} - y_{e})}{\sigma}\right)^2 \right)}\mathrm{;~} \\
+p_{e} = \mathrm{Poiss}( \nu_{e}; y_{e} ) \mathrm{;\ or~} \\
 p_{e} \propto \mathrm{constant\ (on\ some\ interval\ [a,b])}.
 $$
 

mkdocs.yml

@@ -53,11 +53,13 @@ extra_css:
   - "mystyle.css"
 
 extra_javascript:
-  - 'https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/MathJax.js?config=TeX-MML-AM_CHTML'
+  - javascripts/mathjax.js
+  - https://polyfill.io/v3/polyfill.min.js?features=es6
+  - https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js
 
 markdown_extensions:
-        - pymdownx.arithmatex
-        - pymdownx.details
-        - pymdownx.blocks.details
-        - admonition
-        - footnotes 
+  - pymdownx.arithmatex:
+      generic: true
+  - pymdownx.details
+  - pymdownx.blocks.details
+  - admonition