`crystal tool format` with Crystal 1.15.0-dev #370

Job	Run time
test (ubuntu-latest, latest)	1m 34s
test (ubuntu-latest, nightly)	1m 33s
ameba (ubuntu-latest, latest)	1m 0s
test (macos-latest, latest)	1m 20s
format (ubuntu-latest, latest)	20s
test (macos-latest, nightly)	1m 44s
format (ubuntu-latest, nightly)	9s
test (windows-latest, latest)	2m 34s
test (windows-latest, nightly)	2m 36s
	12m 50s

Provide feedback