Add filter to un-double-escape quotation marks

src/core/components/providers/markdown.jsx

@@ -2,8 +2,15 @@ import React, { PropTypes } from "react"
 import Remarkable from "react-remarkable"
 import sanitize from "sanitize-html"
 
+const sanitizeOptions = {
+  textFilter: function(text) {
+    return text
+      .replace(/"/g, "\"")
+  }
+}
+
 function Markdown({ source }) {
-  const sanitized = sanitize(source)
+  const sanitized = sanitize(source, sanitizeOptions)
   return <Remarkable
     options={{html: true, typographer: true, linkify: true, linkTarget: "_blank"}}
     source={sanitized}