Can't use superscript characters with LaTeX output

[krlmlr]

https://github.com/tidyverse/tibble/blob/e17970597fe63132c42229c22a6c06d653637351/revdep/problems.md#newly-broken-4

@yihui: Is there a way to detect that we're running in knitr session that targets LaTeX? We're using superscripted Unicode characters (like in 1.00e⁻⁵) that seem to confuse the LaTeX inputenc package.

[yihui]

knitr:::is_latex_output(). This function was exported recently in the devel version of knitr.

[github-actions]

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