apply rules for [ to [[ and its closing counterpair

[lorenzwalthert]

Closes #1029.

[codecov-commenter]

Codecov Report

Merging #1030 (a6ebe75) into main (c6b978b) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1030      +/-   ##
==========================================
+ Coverage   91.20%   91.21%   +0.01%     
==========================================
  Files          46       46              
  Lines        2683     2687       +4     
==========================================
+ Hits         2447     2451       +4     
  Misses        236      236              

Impacted Files	Coverage Δ
R/token-define.R	66.66% <ø> (ø)
R/expr-is.R	86.11% <100.00%> (ø)
R/indent.R	100.00% <100.00%> (ø)
R/rules-indention.R	100.00% <100.00%> (ø)
R/rules-line-breaks.R	100.00% <100.00%> (ø)

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[github-actions]

This is how benchmark results would change (along with a 95% confidence interval in relative change) if 31e7f6b is merged into main:

•   :ballot_box_with_check:cache_applying: 40.3ms -> 39.9ms [-3.58%, +1.74%]
•   :ballot_box_with_check:cache_recording: 1.14s -> 1.15s [-1.15%, +2.31%]
•   :ballot_box_with_check:without_cache: 2.88s -> 2.85s [-3.1%, +0.97%]

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 673585b is merged into main:

•   :ballot_box_with_check:cache_applying: 25.8ms -> 25.8ms [-0.92%, +1.09%]
•   :ballot_box_with_check:cache_recording: 703ms -> 703ms [-0.3%, +0.34%]
•   :ballot_box_with_check:without_cache: 1.75s -> 1.75s [-0.37%, +0.33%]

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 8a94436 is merged into main:

•   :ballot_box_with_check:cache_applying: 35.6ms -> 35.5ms [-3.28%, +2.39%]
•   :ballot_box_with_check:cache_recording: 964ms -> 961ms [-2.74%, +1.97%]
•   :ballot_box_with_check:without_cache: 2.38s -> 2.41s [-0.91%, +3.17%]

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