cat "$fl" | sed 's|RichEdit>|RichEdit-->|g' | sed 's|RichEditEx>|RichEditEx-->|g' | sed 's|<RichEdit|<!--RichEdit|g' > /tmp/dingtalk.riched.tmp.delete.me &&
cat "$fl" | sed 's|RichEdit>|RichEdit-->|g' | sed 's|RichEditEx>|RichEditEx-->|g' | sed 's|<RichEdit|<!--RichEdit|g' > /tmp/dingtalk.riched.tmp.delete.me &&