Fix RuboCop `Lint/RedundantDirGlobSort` and `Performance/MapCompact` offenses #871

Job	Run time
tap_syntax	45s
functional_tests (ubuntu-latest)	1m 22s
rspec_tests (ubuntu-latest)	9s
rspec_tests (macos-latest)	14s
functional_tests (macos-latest)	1m 19s
	3m 49s

Provide feedback