[MrssFormat] Escape double quotes in XML attributes (#813)
[MrssFormat] Escape double quotes in XML attributes (#813)

XML attributes need to have certain characters escaped to be valid. The title attribute can have double quotes in it which need to be properly encoded for attributes.
simonbru/rss-bridge,Frenzie/rss-bridge,RSS-Bridge/rss-bridge,kranack/rss-bridge,RSS-Bridge/rss-bridge,Riduidel/rss-bridge,RSS-Bridge/rss-bridge,kranack/rss-bridge,Riduidel/rss-bridge,Riduidel/rss-bridge,ORelio/rss-bridge,kranack/rss-bridge,sebsauvage/rss-bridge,ORelio/rss-bridge,kranack/rss-bridge,Frenzie/rss-bridge,ORelio/rss-bridge,simonbru/rss-bridge