tests

Prefer double quotes #120

Job	Run time
Style	9s
py-3.9 lib-6.0 windows-latest	4m 43s
package-source	23s
py-3.9 lib-6.0 ubuntu-latest	4m 13s
py-3.9 lib-5.1 windows-latest	4m 50s
py-3.9 lib-5.1 ubuntu-latest	4m 2s
package-wheel (macos-latest, arm64)	14m 55s
py-3.9 lib-6.0 macos-latest	5m 43s
package-wheel (macos-latest, x86_64)	24m 28s
package-wheel (ubuntu-latest, i686)	16m 41s
package-wheel (ubuntu-latest, x86_64)	15m 35s
package-wheel (windows-latest, AMD64)	13m 47s
publish	32s
	1h 50m 1s

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