Add a commit-msg hook lint and various other cleanups

Turns out that gitlint by default enforces the exact commit-msg format that I
like to use. I'm enabling this because even I write poor commit messages
sometimes, and looking back on my commits from even a few days ago is sometimes
not very helpful.

I also made some minor comment and nix changes that I noticed while reviewing my
work from the last few days.

1 files changed, 1 insertions, 1 deletions

diff --git a/Biz/Bild/Example.py b/Biz/Bild/Example.py
index 25686fa..5d165d8 100644
--- a/Biz/Bild/Example.py
+++ b/Biz/Bild/Example.py
@@ -1,6 +1,6 @@
 """
 Example Python file that also serves as a test case for bild.
-fernet."""
+"""
 # : out example
 # : dep cryptography
 import sys