Stricter alignemnt detection for unequal number of tokens on different lines

[lorenzwalthert]

Closes #901. We first fix a bug that counted , twice when calculating the column value. This was irrelevant so far because it acted like an offset that affected all values. Also towards #258.

[codecov-commenter]

Codecov Report

Merging #903 (3d33d16) into main (10b064b) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #903      +/-   ##
==========================================
+ Coverage   90.33%   90.35%   +0.01%     
==========================================
  Files          47       47              
  Lines        2546     2551       +5     
==========================================
+ Hits         2300     2305       +5     
  Misses        246      246              

Impacted Files	Coverage Δ
R/detect-alignment.R	97.46% <100.00%> (+0.17%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 10b064b...3d33d16. Read the comment docs.

[github-actions]

This is how benchmark results would change (along with a 95% confidence interval in relative change) if 1695b96 is merged into main:

•   :ballot_box_with_check:cache_applying: 23.2ms -> 23.2ms [-0.79%, +0.52%]
•   :ballot_box_with_check:cache_recording: 972ms -> 972ms [-0.4%, +0.55%]
•   :ballot_box_with_check:without_cache: 2.59s -> 2.58s [-0.95%, +0.08%]

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

[github-actions]

This is how benchmark results would change (along with a 95% confidence interval in relative change) if e7ad5f7 is merged into main:

•   :ballot_box_with_check:cache_applying: 22.5ms -> 22.7ms [-0.82%, +2.48%]
• ❗🐌cache_recording: 979ms -> 1.01s [+0.5%, +5.08%]
•   :ballot_box_with_check:without_cache: 2.71s -> 2.66s [-3.97%, +0.54%]

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