Using backticks instead of \code{} around code blocks.

https://style.tidyverse.org/documentation.html#r-code

The tidyverse style guide recommends turning on markdown support for roxygen and using backticks instead of \code{} around code blocks.

Update throughout the package.

Read the linked tidyverse documentation style guide, then search the package for roxygen documentation using \code{} and check where markdown support is configured. Done means the package consistently uses backticks for code blocks and no outdated \code{} wrappers remain.

Written by the indexing model from the issue text.