use standard misskey content unless asked not to

src/components/rich_content/rich_content.jsx

@@ -10,6 +10,11 @@ import HashtagLink from 'src/components/hashtag_link/hashtag_link.vue'
 
 import './rich_content.scss'
 
+const selectContent = (html, sourceContent, mfm) => {
+  if (!mfm) return html
+  return sourceContent === '' ? html : sourceContent
+}
+
 /**
  * RichContent, The Über-powered component for rendering Post HTML.
  *
@@ -79,7 +84,7 @@ export default {
     const greentext = this.mfm ? false : this.greentext
 
     // Pre-process HTML
-    const useContent = this.sourceContent === '' ? this.html : this.sourceContent
+    const useContent = selectContent(this.html, this.sourceContent, this.mfm)
     const { newHtml: html } = preProcessPerLine(useContent, greentext)
     let currentMentions = null // Current chain of mentions, we group all mentions together
     // This is used to recover spacing removed when parsing mentions