Fix typo

docs/source/development.rst

@@ -943,7 +943,7 @@ messageSend
 
 When a message will be sent out.
 
-``storage_memoryconverse.listen.on('messageSend', function (event, messageText) { ... });``
+``converse.listen.on('messageSend', function (event, messageText) { ... });``
 
 noResumeableSession
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