Fix typos in comments, documentation and test method names
diff --git a/Lib/urllib/robotparser.py b/Lib/urllib/robotparser.py
index 4fbb0cb..8b69fd9 100644
--- a/Lib/urllib/robotparser.py
+++ b/Lib/urllib/robotparser.py
@@ -132,7 +132,7 @@
             return True
         # Until the robots.txt file has been read or found not
         # to exist, we must assume that no url is allowable.
-        # This prevents false positives when a user erronenously
+        # This prevents false positives when a user erroneously
         # calls can_fetch() before calling read().
         if not self.last_checked:
             return False