Revision summary printing

[dajmcdon]

Checklist

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  brookslogan, nmdefries.
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Change explanations for reviewer

@dsweber2 I wanted to improve the printing behavior of revision_summary(). How does this look to you?

[dsweber2]

Made some fixes, but generally happy to see this.

There were some objects where you were referencing at the wrong depth when printing, which was changing the "No revision" count.

[dajmcdon]

Thanks! I want to do one other thing, which is to move the args that apply only to printing to the print method. But I'm having difficulty figuring out what difftime_approx_ceiling_time_delta() is supposed to do (internal/undocumented). Is there a way to avoid that here?

[dsweber2]

The idea with difftime_approx_ceiling_time_delta is to represent the given duration in the given time_type by rounding up to the nearest whole value of that time_type. For quick_revision on a weekly archive, 3 days rounds up to 1 week instead of being effectively 0 for the purposes of detecting revisions.

[dajmcdon]

@dsweber2 Does this still look ok after my changes?

[dsweber2]

yep, lgtm!