Fix alignment detection for quoted keys

[lorenzwalthert]

Closes #881. Towards #258.

[codecov-commenter]

Codecov Report

Merging #882 (4833340) into main (c2e25f9) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #882   +/-   ##
=======================================
  Coverage   89.75%   89.76%           
=======================================
  Files          47       47           
  Lines        2499     2500    +1     
=======================================
+ Hits         2243     2244    +1     
  Misses        256      256           

Impacted Files	Coverage Δ
R/detect-alignment-utils.R	90.62% <100.00%> (+0.14%)	⬆️

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[github-actions]

This is how benchmark results would change (along with a 95% confidence interval in relative change) if 539f7a1 is merged into main:

•   :ballot_box_with_check:cache_applying: 31.9ms -> 32ms [-0.34%, +0.81%]
•   :rocket:cache_recording: 1.15s -> 1.15s [-0.65%, -0.02%]
•   :ballot_box_with_check:without_cache: 3.04s -> 3.04s [-0.53%, +0.34%]

Further explanation regarding interpretation and methodology can be found in the documentation.