Fix format and style

[danlooo]

This PR aims to apply all formating rules and style guides defined by the Julai VScode extension. See https://www.julia-vscode.org/ for further details.

[codecov]

Codecov Report

Attention: Patch coverage is 49.15254% with 30 lines in your changes missing coverage. Please review.

Project coverage is 74.16%. Comparing base (d93555a) to head (8a44fd6).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/auxil.jl	43.39%	30 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #105      +/-   ##
==========================================
+ Coverage   74.03%   74.16%   +0.12%     
==========================================
  Files           5        6       +1     
  Lines         208      209       +1     
==========================================
+ Hits          154      155       +1     
  Misses         54       54              

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