Add a code-review checklist.
Code review file specific to Haskell, so rename accordingly.
Include link to recent Well-Typed blog post about foldl'.
Slightly less verbose section headings.
Some more tips to check during review.
Remove alternate form of copyright notice for main modules.

Redundancy for the sake of consistency is a reasonable payoff.
Move copyright notices section to top.
Use exactly one LANGUAGE pragma per extension.
Various fixes and additions to memory leak section.
Note about bad style in intermediate states section.
Rename pure code memory leaks section.
Reword mvar section.