Fix our evaluation formula

.pylintrc

@@ -82,7 +82,7 @@ reports=no
 # respectively contain the number of errors / warnings messages and the total
 # number of statements analyzed. This is used by the global evaluation report
 # (RP0004).
-evaluation=100.0 - ((float(5 * error + warning + refactor + convention) / statement) * 100)
+evaluation=10.0 - ((float(5 * error + warning + refactor + convention) / statement) * 10)
 
 # Template used to display messages. This is a python new-style format string
 # used to format the message information. See doc for all details