BUG: Blocks empty difference

[martinfleis]

No description provided.

[codecov]

Codecov Report

Merging #230 (96f87fe) into master (56317eb) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #230   +/-   ##
=======================================
  Coverage   96.92%   96.92%           
=======================================
  Files          12       12           
  Lines        2633     2635    +2     
=======================================
+ Hits         2552     2554    +2     
  Misses         81       81           

Impacted Files	Coverage Δ
momepy/elements.py	96.91% <100.00%> (+0.01%)	⬆️

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