{%macro katex() %} <link rel="stylesheet" href="/katex/katex.min.css"/> <script defer src="/katex/katex.min.js"></script> <script defer src="/katex/contrib/auto-render.min.js" onload="renderMathInElement(document.body, {delimiters: [{left:'$$',right:'$$',display:true},{left:'$',right:'$',display:false}]});"></script> {%endmacro katex %} {%macro langurl() %}{% if lang != "en" %}{{lang}}/{% endif %}{%endmacro langurl %}