Maintainer: ‘Krämer Konrad <konrad_kraemer@yahoo.de>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: person(given = "Krämer",
                    family = "Konrad",
                    role = c("aut", "cre"),
                    email = "konrad_kraemer@yahoo.de")
as necessary.

The BugReports field in DESCRIPTION has
  https://github.com/Konrad1991/ast2ast
which should likely be
  https://github.com/Konrad1991/ast2ast/issues
instead.
Maintainer: ‘Krämer Konrad <konrad_kraemer@yahoo.de>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: person(given = "Krämer",
                    family = "Konrad",
                    role = c("aut", "cre"),
                    email = "konrad_kraemer@yahoo.de")
as necessary.

The BugReports field in DESCRIPTION has
  https://github.com/Konrad1991/ast2ast
which should likely be
  https://github.com/Konrad1991/ast2ast/issues
instead.