assert_numeric error is uninformative for matrices

[selkamand]

library(assertions)
#> Warning: package 'assertions' was built under R version 4.4.1
assert_numeric(matrix(LETTERS[1:5]))
#> Error:
#> ! 'matrix(LETTERS[1:5])' must be numeric, not a matrix and array

^{Created on 2025-06-25 with reprex v2.1.1}