Changed to report repeated pep8 issues.

Makefile

@@ -5,15 +5,16 @@ clean:
 
 MININET = mininet/*.py
 TEST = mininet/test/*.py
+EXAMPLES = examples/*.py
 BIN = bin/mn bin/mnclean
-PYSRC = $(MININET) $(TEST) $(BIN)
+PYSRC = $(MININET) $(TEST) $(EXAMPLES) $(BIN)
 
 P8IGN = E251,E201,E302
 
 codecheck: $(PYSRC)
 	pyflakes $(PYSRC)
 	pylint --rcfile=.pylint $(PYSRC)
-	pep8 --ignore=$(P8IGN) $(PYSRC)
+	pep8 --repeat --ignore=$(P8IGN) $(PYSRC)
 
 test: $(MININET) $(TEST)
 	mininet/test/test_nets.py