- export S3 methods, even if corresponding generic is not exported
- document the sentinel "_PACKAGE" rather than using @doctype

- two tests fail because the length of the return value has changed (from
  17 to 18 list elements)

  - hard to know how the return value has changed -- simple additiion? of
    which element? etc
  - assume the change does not break code
  - make more robust by checking for set equality of current and returned
    names

- reduce messages from `readr::read_csv()` by providing
  `col_classes = FALSE` argument
- silence progress in test-search.R by adding `verbose = TRUE`

- 'license' is now a list; print the 'name'
- 'length(x$files)` is incorrect for a data.frame, use `NROW()`

…t -- the"doi:" prefix is not necessary

- handle previous as well as current 'License' format

Also no need to setequal