build

fix(group): do not render newline before empty help #12

Job	Run time
spinner (1.19, ubuntu-latest)	22s
test (1.19, ubuntu-latest)	13s
examples (1.19, ubuntu-latest)	14s
test (1.19, macos-latest)	19s
examples (1.19, macos-latest)	16s
test (1.19, windows-latest)	19s
spinner (1.19, macos-latest)	39s
examples (1.19, windows-latest)	15s
test (stable, ubuntu-latest)	20s
spinner (1.19, windows-latest)	1m 32s
examples (stable, ubuntu-latest)	10s
test (stable, macos-latest)	1s
spinner (stable, ubuntu-latest)	25s
examples (stable, macos-latest)	15s
test (stable, windows-latest)	18s
spinner (stable, macos-latest)	35s
examples (stable, windows-latest)	15s
spinner (stable, windows-latest)	2m 43s
	9m 11s

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