Small second pass on logs

[ewjoachim]

Cf. #102

Successful PR Checklist:

• Tests
• Documentation (optionally: run spell checking)
• Had a good time contributing? (if not, feel free to give some feedback)

[codecov-io]

Codecov Report

Merging #159 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #159   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          21     21           
  Lines         833    839    +6     
  Branches       84     85    +1     
=====================================
+ Hits          833    839    +6

Impacted Files	Coverage Δ
procrastinate/app.py	100% <100%> (ø)	⬆️
procrastinate/cli.py	100% <100%> (ø)	⬆️
procrastinate/worker.py	100% <100%> (ø)	⬆️

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[ewjoachim]

In wonder if each log should be tested...

[mgu]

thanks

[mgu]

In wonder if each log should be tested...

I wonder why no linters have seen the issues

[elemoine]

One question, otherwise looks good to me. Thanks!