fix

markov.py

@@ -45,7 +45,8 @@ class Markov:
         text = filter(bool, text)
         text = list(text)
 
-        self.corpus.insert(0, text)
+        if text not in self.corpus:
+            self.corpus.insert(0, text)
 
         if len(self.corpus) > config.MARKOV_CORPUS_SIZE:
             self.corpus = self.corpus[: config.MARKOV_CORPUS_SIZE]