Checklist for the next lesson release

[maxim-belkin]

This issue supersedes swcarpentry/python-novice-inflammation#640

@annefou and I decided to skip June 2019 release of this lesson as there is a number of issues/PRs that we'd like to be resolved in the next release. Below is the original checklist for participating in June 2019 release. After the original list, we include a list of additional Pull Requests & Issues we'd like to be resolved (or closed, if obsolete) before the next release

• [ ] Example code chunks run as expected
• [ ] Challenges / exercises run as expected
• [ ] Challenge / exercise solutions are correct
• [x] Callout boxes (exercises, discussions, tips, etc) render correctly
• [x] A schedule appears on the lesson homepage (e.g. not “00:00”)
• [x] Each episode includes learning objectives
• [x] Each episode includes questions
• [x] Each episode includes key points
• [x] Setup instructions are up-to-date, correct, clear, and complete
• [x] File structure is clean (e.g. delete deprecated files, ensure filenames are consistent)
• [x] Some Instructor notes are provided
• [ ] Lesson links work as expected (related to https://github.com/carpentries/styles/issues/410)

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• [ ] Remove demotivating use of "just": swcarpentry/python-novice-imflammation#653
• [ ] Evaluate the use of dismissive language in the lesson (For reference, see this link)
• [ ] Discuss the possibility of splitting intro to variables into a separate episode
• [ ] Switch lists and loops episodes (swcarpentry/python-novice-inflammation#496)
• [ ] Improve episode 1 (swcarpentry/python-novice-inflammation#543)

@annefou please feel free to add any other items I might've forgotten about.