fixed_regex_linter is pipe-aware

[MichaelChirico]

Closes #1811

[codecov-commenter]

Codecov Report

Merging #2094 (45abd45) into main (720c18e) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 45abd45 differs from pull request most recent head 6a3cfc8. Consider uploading reports for the commit 6a3cfc8 to get more accurate results

@@           Coverage Diff           @@
##             main    #2094   +/-   ##
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  Coverage   99.65%   99.65%           
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  Files         117      117           
  Lines        5145     5158   +13     
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+ Hits         5127     5140   +13     
  Misses         18       18           

Files Changed	Coverage Δ
R/fixed_regex_linter.R	100.00% <100.00%> (ø)

[AshesITR]

LGTM, maybe add a test for |>?

[MichaelChirico]

Good catch. Basically the same amount of code to factorialize the test & cover all pipes, so did that while we're at it.