Subject: pypi importer doesn't print the correct source

From: Julien Lepiller <[email-masked]>
Date: Mon, 15 Oct 2018 15:39:15 +0200

Hi, I tried to use the importer to refresh python-twisted, and got this 
source:

(uri (pypi-uri "twisted" version))

while the correct one should be

(uri (pypi-uri "Twisted" version ".tar.bz2"))