Use proper ellipsis (U+2026)

include/sardine.py

         self.plugin = module.Plugin(self.plugindata)
 
     def _format_output(self, raw):
-        suffix = "..."
+        suffix = "…"
         cooked = raw
         if self.plugindata.fmt == "plain":
             if len(raw) > self.plugindata.maxlen: