Fix calendar authentication text, and handle calendar events without summaries. (#6337)

* Fixed google authorization text

* Let calendar handle events without a summary

homeassistant/components/calendar/__init__.py

@@ -155,7 +155,7 @@ class CalendarEventDevice(Entity):
         start = _get_date(self.data.event['start'])
         end = _get_date(self.data.event['end'])
 
-        summary = self.data.event['summary']
+        summary = self.data.event.get('summary', '')
 
         # check if we have an offset tag in the message
         # time is HH:MM or MM

homeassistant/components/google.py

@@ -118,8 +118,8 @@ def do_authentication(hass, config):
         return False
 
     persistent_notification.create(
-        hass, 'In order to authorize Home-Assistant to view your calendars'
-              'You must visit: <a href="{}" target="_blank">{}</a> and enter'
+        hass, 'In order to authorize Home-Assistant to view your calendars '
+              'you must visit: <a href="{}" target="_blank">{}</a> and enter '
               'code: {}'.format(dev_flow.verification_url,
                                 dev_flow.verification_url,
                                 dev_flow.user_code),