Using shared markdown options for plain text

fixes #7960
closes #8277

Changelog.md

@@ -14,6 +14,7 @@
 * Add tags to tumblr posts [#8244](https://github.com/diaspora/diaspora/pull/8244)
 * Add blocks to the archive export [#8263](https://github.com/diaspora/diaspora/pull/8263)
 * Allow points and dashes in the username [#8266](https://github.com/diaspora/diaspora/pull/8266)
+* Add support for footnotes in markdown [#8277](https://github.com/diaspora/diaspora/pull/8277)
 
 # 0.7.15.0
 

lib/diaspora/message_renderer.rb

@@ -50,7 +50,9 @@ module Diaspora
       end
 
       def strip_markdown
-        renderer = Redcarpet::Markdown.new Redcarpet::Render::StripDown, options[:stripdown_options]
+        # Footnotes are not supported in text-only outputs (mail, crossposts etc)
+        stripdown_options = options[:markdown_options].except(:footnotes)
+        renderer = Redcarpet::Markdown.new Redcarpet::Render::StripDown, stripdown_options
         @message = renderer.render(message).strip
       end
 
@@ -114,14 +116,6 @@ module Diaspora
                 squish:                  false,
                 escape:                  true,
                 escape_tags:             false,
-                stripdown_options:       {
-                  autolink:            true,
-                  fenced_code_blocks:  true,
-                  space_after_headers: true,
-                  strikethrough:       true,
-                  tables:              true,
-                  no_intra_emphasis:   true
-                },
                 markdown_options:        {
                   autolink:            true,
                   fenced_code_blocks:  true,