BUG: fix ordering of closed loops in remove_false_nodes

[martinfleis]

This addition ensures that closed loops have their start/end point attached to the rest of the network.

[codecov]

Codecov Report

Attention: Patch coverage is 60.71429% with 11 lines in your changes missing coverage. Please review.

Project coverage is 98.0%. Comparing base (4037c70) to head (a97642d).
Report is 88 commits behind head on main.

Files with missing lines	Patch %	Lines
momepy/preprocessing.py	57.7%	11 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            main    #645     +/-   ##
=======================================
+ Coverage   97.4%   98.0%   +0.6%     
=======================================
  Files         26      38     +12     
  Lines       4328    6269   +1941     
=======================================
+ Hits        4214    6143   +1929     
- Misses       114     126     +12     

Files with missing lines	Coverage Δ
momepy/tests/test_preprocess.py	100.0% <100.0%> (ø)
momepy/preprocessing.py	91.4% <57.7%> (-2.0%)	⬇️

[jGaboardi]

@martinfleis Are the 2 failures in dev due to the ongoing Graph work there? If there are, I'll approve.

[martinfleis]

That is gonna be the higher_order fix I merged in lib.