Added new patch to fix Markdown rendering (Closes: #890757).

Thanks, Libor Klepáč.

debian/patches/890757.patch

@@ -0,0 +1,21 @@
+Last-Update: 2018-03-14
+Forwarded: not-needed
+Bug-Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=890757
+Author: Dmitry Smirnov <onlyjob@debian.org>
+Description: fix markdown rendering.
+
+Thanks, Libor Klepáč.
+
+--- a/lib/banzai/filter/markdown_filter.rb
++++ b/lib/banzai/filter/markdown_filter.rb
+@@ -13,9 +13,9 @@
+       end
+ 
+       def self.renderer
+         @renderer ||= begin
+-          renderer = Banzai::Renderer::HTML.new
++          renderer = Redcarpet::Render::HTML.new
+           Redcarpet::Markdown.new(renderer, redcarpet_options)
+         end
+       end
+ 

debian/patches/series

@@ -21,6 +21,7 @@ pid-log-paths.patch
 0370-relax-prof.patch
 0410-set-webpack-root.patch
 0420-use-system-libs.patch
+890757.patch
 add-system-lib-path-for-webpack.patch
 remove-bundle-analyzer.patch
 fix-mail-room-path.patch