add sending output format strings lab with python string format

[jasinner]

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Uses the python string format to demonstrate the Format Strings and Templates section of course.

This example came from Be Careful with Python's New-Style String Format by Armin Ronacher and was produced in collaboration with @david-a-wheeler

[jasinner]

I'm having trouble getting the hints to work. Appreciate some help with that @david-a-wheeler

[david-a-wheeler]

Thanks so much for the update! I provided a few comments. Can you please do a DCO signoff?

[david-a-wheeler]

Hi - you're so close! Can you please finish this soon? Thanks so much!

[david-a-wheeler]

I'm having trouble getting the hints to work. Appreciate some help with that @david-a-wheeler

You're missing the hints: field identifier. You should see something like this:

<script id="info" type="application/yaml">
---
hints:
- absent: "user_input"

[david-a-wheeler]

Can you try to wrap this up sooner if you can? We're trying to get a number of the labs out-the-door :-).

Also: I had assigned "Debug and Assertion" to you as well. I thinking of unassigning until you complete this one, and once you're done with this, let me know which available ones you'd like to do. Pre-assigning more than one was probably a bad idea, sorry about that.

[david-a-wheeler]

Hi, I haven't heard from you in 2 weeks, and we need to get moving. I do appreciate the work you've done so far. I plan to complete your lab myself and merge it, and do the debug lab myself instead. Thanks!

[david-a-wheeler]

More needs fixing, but it's easier to merge first & create separate fixes.