Consistently use @examplesIf for conditionally running examples

[IndrajeetPatil]

Follow up on #1068, where I introduced these deviations.

[codecov-commenter]

Codecov Report

Merging #1071 (41d70f0) into main (ee8eb81) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1071   +/-   ##
=======================================
  Coverage   91.06%   91.06%           
=======================================
  Files          46       46           
  Lines        2685     2685           
=======================================
  Hits         2445     2445           
  Misses        240      240           

Impacted Files	Coverage Δ
R/detect-alignment-utils.R	97.18% <ø> (ø)
R/rules-line-breaks.R	100.00% <ø> (ø)
R/ui-styling.R	100.00% <ø> (ø)

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[github-actions]

This is how benchmark results would change (along with a 95% confidence interval in relative change) if ee8eb81 is merged into main:

• ❗🐌cache_applying: 29ms -> 29.6ms [+0.37%, +3.82%]
•   :ballot_box_with_check:cache_recording: 887ms -> 886ms [-1.14%, +0.96%]
•   :ballot_box_with_check:without_cache: 2.23s -> 2.22s [-1.69%, +0.47%]

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