Updated Cookie Crumble to ensure that snapshot files end with a newline

[glen-84]

Summary of the changes (Less than 80 chars)

• Updated Cookie Crumble to ensure that snapshot files end with a newline.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.32%. Comparing base (7b81b8c) to head (be815b6).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7378      +/-   ##
==========================================
- Coverage   77.35%   77.32%   -0.03%     
==========================================
  Files        2481     2793     +312     
  Lines      123062   139421   +16359     
==========================================
+ Hits        95197   107810   +12613     
- Misses      27865    31611    +3746     

Flag	Coverage Δ
unittests	77.32% <100.00%> (-0.03%)	⬇️

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