Fix lint issues

[lshandross]

Fixes Issue #103

[github-actions]

🚀 Deployed on https://6615576a777f23059991d7a8--hubensembles-pr-previews.netlify.app

[codecov]

Codecov Report

Attention: Patch coverage is 89.47368% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 87.83%. Comparing base (f878abc) to head (7e12730).

❗ Current head 7e12730 differs from pull request most recent head 99468e4. Consider uploading reports for the commit 99468e4 to get more accurate results

Files	Patch %	Lines
R/linear_pool.R	69.23%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #105      +/-   ##
==========================================
+ Coverage   87.75%   87.83%   +0.08%     
==========================================
  Files           5        5              
  Lines         147      148       +1     
==========================================
+ Hits          129      130       +1     
  Misses         18       18              

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