definition bot: Clarify error message.

zulip_bots/zulip_bots/bots/define/define.py

@@ -11,7 +11,7 @@ class DefineHandler(object):
     '''
 
     DEFINITION_API_URL = 'https://owlbot.info/api/v1/dictionary/{}?format=json'
-    REQUEST_ERROR_MESSAGE = 'Definition not available.'
+    REQUEST_ERROR_MESSAGE = 'Could not load definition.'
     EMPTY_WORD_REQUEST_ERROR_MESSAGE = 'Please enter a word to define.'
     PHRASE_ERROR_MESSAGE = 'Definitions for phrases are not available.'
 

zulip_bots/zulip_bots/bots/define/test_define.py

@@ -42,7 +42,7 @@ class TestDefineBot(BotTestCase):
             )
 
         # Incorrect word.
-        bot_response = "**foo**:\nDefinition not available."
+        bot_response = "**foo**:\nCould not load definition."
         with self.mock_http_conversation('test_incorrect_word'):
             self.assert_bot_response(
                 message = {'content': 'foo'},