Lukasa/requests — comment on commit 658da765ecc72b369a9f01d267ffb5db4bb6871e
File: requests/packages/oreos/monkeys.py line 256
By piotr-dobrogost:

I was thinking something along the lines

```python
RFC2109_forbidden = "[]:{}"
_LegalChars = something + RFC2109_forbidden

```
This way code is self documenting. In addition we should probably refer to RFC 2965 which obsoletes RFC 2109 if it has the same requirements with regard to allowed/forbidden chars of course.