format code using black

[aladdinpersson]

No description provided.

[codecov-commenter]

Codecov Report

Merging #34 into master will increase coverage by 0.03%.
The diff coverage is 68.88%.

@@            Coverage Diff             @@
##           master      #34      +/-   ##
==========================================
+ Coverage   80.03%   80.06%   +0.03%     
==========================================
  Files          24       24              
  Lines         596      597       +1     
==========================================
+ Hits          477      478       +1     
  Misses        119      119              

Impacted Files	Coverage Δ
Algorithms/sorting/mergesort.py	84.21% <0.00%> (ø)
Algorithms/graphtheory/prims/prim_heap.py	66.66% <28.57%> (ø)
Algorithms/graphtheory/dijkstra/heapdijkstra.py	68.18% <33.33%> (ø)
Algorithms/sorting/insertionsort.py	61.53% <33.33%> (ø)
...theory/kahns-toposort/kahn_topological_ordering.py	74.19% <37.50%> (+0.86%)	⬆️
...lgorithms/graphtheory/kruskal/kruskal_unionfind.py	41.93% <44.44%> (ø)
Algorithms/other/interval_scheduling.py	42.85% <50.00%> (ø)
Algorithms/other/binarysearch.py	77.77% <55.55%> (ø)
Algorithms/sorting/selectionsort.py	40.90% <60.00%> (ø)
...tersection_of_two_sets/intersection_of_two_sets.py	80.00% <70.00%> (ø)
... and 25 more

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