Satisfy R CMD check

- Depend on R >= 3.5.0, because the format used for the data is not
  known to earlier R versions
- Rename the datasets from `test` to their proper name

1 files changed, 3 insertions, 0 deletions

diff --git a/man/din38402c3.Rd b/man/din38402c3.Rd
index 7c00999..e9ac83e 100644
--- a/man/din38402c3.Rd
+++ b/man/din38402c3.Rd
@@ -8,6 +8,9 @@
 A tibble containing 10 concentration levels and the respective
 response values.
 }
+\usage{
+din38402c3
+}
 \description{
 Example dataset C.3 from DIN 38402 determined by ion chromatography.
 Concentrations are reported in mg/L and the extinction as response.