pep8 fixes

[hugovk]

No description provided.

[codecov]

Codecov Report

Merging #6 into master will decrease coverage by 1.36%.
The diff coverage is 73.57%.

@@            Coverage Diff             @@
##           master       #6      +/-   ##
==========================================
- Coverage   76.02%   74.66%   -1.37%     
==========================================
  Files           1        1              
  Lines         146      150       +4     
==========================================
+ Hits          111      112       +1     
- Misses         35       38       +3

Impacted Files	Coverage Δ
src/osmviz/manager.py	74.66% <73.57%> (-1.37%)	⬇️

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