Removes the checks recorded so far with check_result() and
check_design(), so that the next check_summary() only counts new
checks. It does not check or change any design or data; it only empties
the list. A message says how many earlier checks were cleared and how many
of them had passed.
Examples
check_reset()
#> Ready to start: no earlier checks to clear. The checks you run from now on will be counted together.
check_result("one equals one", 1 == 1)
#> [OK] one equals one
check_reset()
#> Earlier checks cleared (1 check, which passed). Ready to start new checks.