slack_rtm.rb in ruboty-slack_rtm-3.2.5

- old
+ new

@@ -244,9 +244,10 @@
 
         [CGI.unescapeHTML(text), mention_to]
       end
 
       def resolve_send_mention(text)
+        return '' if text.nil?
         text = text.dup.to_s
         text.gsub!(/@(?<mention>[0-9a-z._-]+)/) do |_|
           mention = Regexp.last_match[:mention]
           msg = "@#{mention}"
 