two_neighbor_step without computing intersection numbers

[simonbrandhorst]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 82.40000% with 22 lines in your changes missing coverage. Please review.

Project coverage is 84.60%. Comparing base (78da753) to head (d350e36).
Report is 11 commits behind head on master.

Files with missing lines	Patch %	Lines
experimental/Schemes/src/elliptic_surface.jl	82.40%	22 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4185      +/-   ##
==========================================
+ Coverage   84.59%   84.60%   +0.01%     
==========================================
  Files         631      631              
  Lines       84813    84951     +138     
==========================================
+ Hits        71747    71874     +127     
- Misses      13066    13077      +11     

Files with missing lines	Coverage Δ
src/AlgebraicGeometry/Surfaces/K3Auto.jl	93.00% <ø> (ø)
experimental/Schemes/src/elliptic_surface.jl	86.05% <82.40%> (-0.19%)	⬇️

... and 17 files with indirect coverage changes

[simonbrandhorst]

Once #4189 is merged we should get a green test here also.