add test for sup and sub tags (#50)

* add test for sup and sub tags

* add RawInline support to the lua filter

* try returning a RawInline

Author: chrisfenner

filter/parse-html.lua

@@ -5,4 +5,10 @@ function RawBlock (raw)
       and pandoc.read(raw.text, 'html').blocks
       or raw
   end
+  
+function RawInline (raw)
+    return raw.format:match 'html'
+      and pandoc.RawInline(raw.text, 'html')
+      or raw
+  end
 

sample1.md

@@ -73,6 +73,10 @@ Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu
 fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in
 culpa qui officia deserunt mollit anim id est laborum.
 
+00 01 02 03 04<sub>16</sub>
+
+a<sup>n</sup> + b<sup>n</sup> = c<sup>n</sup>
+
 ## Figures
 
 ### Computer