Add mathjax to other types of pages, not just posts. (#310)

Ricardo Zago

26.31.2020 c664951c54a5a6473e5004b0ffe5a100f7921660

 layouts/_default/single.html

@@ -3,4 +3,5 @@
{{ end }}
{{ define "content" }}
  {{ partial "page.html" . }}
  {{ partial "posts/math.html" . }}
{{ end }}