Don't error on empty input #50

Job	Run time
Style checks for 1.87 on ubuntu-latest	18s
Style checks for 1.84.1 on macos-latest	19s
Style checks for 1.87 on macos-latest	20s
Style checks for stable on macos-latest	16s
Style checks for stable on ubuntu-latest	17s
Style checks for 1.84.1 on ubuntu-latest	19s
Style checks for 1.87 on windows-latest	43s
Style checks for 1.84.1 on windows-latest	46s
Style checks for stable on windows-latest	46s
Build and test for 1.84.1 on ubuntu-latest	21s
Build and test for 1.84.1 on macos-latest	25s
Build and test for stable on macos-latest	20s
Build and test for stable on ubuntu-latest	20s
Build and test for 1.87 on ubuntu-latest	21s
Build and test for 1.87 on macos-latest	19s
Build and test for 1.84.1 on windows-latest	41s
Build and test for 1.87 on windows-latest	46s
Build and test for stable on windows-latest	50s
	8m 27s

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