fn name_problem(package: &str, name: &str, literal: bool) -> Option<String>Expand description
Why name can’t be re-exported, if it can’t. Written as identifiers it
must be a syntactic R name; a string literal may be any non-empty ASCII
text without whitespace, control characters or the quoting characters
`, \ and ", which the generated R code and roxygen2 tags write
verbatim or between quotes.