Minor fixes.

offline_asr.py

@@ -332,7 +332,9 @@ class OfflineAsr(object):
             results = self.sp.decode(tokens)
         else:
             results = [[self.token_table[i] for i in hyp] for hyp in tokens]
+            blank = chr(0x2581)
             results = ["".join(r) for r in results]
+            results = [r.replace(blank, " ") for r in results]
 
         return results