check_model error suggestions are not complete #566

Job	Run time
R-CMD-check / macOS-latest (release)	16m 0s
R-CMD-check / windows-latest (devel)	24m 35s
R-CMD-check / windows-latest (release)	31m 16s
R-CMD-check / windows-latest (oldrel)	27m 53s
R-CMD-check / ubuntu-latest (devel)	25m 54s
R-CMD-check / ubuntu-latest (release)	17m 33s
R-CMD-check / ubuntu-latest (oldrel)	30m 53s
R-CMD-check / ubuntu-latest (oldrel-2)	8m 37s
R-CMD-check / ubuntu-latest (oldrel-3)	8m 57s
R-CMD-check / ubuntu-latest (3.6)	6m 27s
	3h 18m 5s

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