Allow for passing `-n` option to `whereami` #467

Job	Run time
ruby-versions / Generate Ruby versions	5s
test (3.1)	45s
test (4.0)	53s
test (debug)	1m 18s
test (3.4)	52s
test (3.0)	47s
test (3.2)	58s
test (3.3)	57s
test (head)	53s
	7m 28s

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