Use examplesIf in roxygen comments

[strengejacke]

cf. easystats/easystats#318

[codecov]

Codecov Report

Merging #615 (b3caf5b) into main (05202d2) will not change coverage.
The diff coverage is 4.76%.

❗ Current head b3caf5b differs from pull request most recent head a85fa62. Consider uploading reports for the commit a85fa62 to get more accurate results

@@           Coverage Diff           @@
##             main     #615   +/-   ##
=======================================
  Coverage   51.92%   51.92%           
=======================================
  Files          84       84           
  Lines        5778     5778           
=======================================
  Hits         3000     3000           
  Misses       2778     2778           

Files Changed	Coverage Δ
R/check_convergence.R	60.00% <ø> (ø)
R/check_distribution.R	0.00% <0.00%> (ø)
R/check_itemscale.R	57.77% <ø> (ø)
R/check_model.R	31.29% <ø> (ø)
R/check_multimodal.R	0.00% <ø> (ø)
R/check_normality.R	41.41% <ø> (ø)
R/check_predictions.R	25.33% <ø> (ø)
R/check_sphericity.R	45.83% <ø> (ø)
R/check_symmetry.R	0.00% <ø> (ø)
R/check_zeroinflation.R	54.05% <ø> (ø)
... and 13 more