ARROW-12714 added the str_to_title kernel and a basic mapping, but we should add a test. Also the stringr function takes a "locale" argument which is not handled here; we should either pass it to Arrow C++ if it supports it (which I doubt) or error if a value is provided in R.

This also applies to str_to_lower and str_to_upper kernels.

Reporter: Neal Richardson / @nealrichardson
Assignee: Eduardo Ponce / @edponce

Related issues:

• [C++] Add locale support for relevant string compute functions (is related to)

PRs and other links:

• GitHub Pull Request #11232

_{Note: This issue was originally created as ARROW-13853. Please see the migration documentation for further details.}