Remove empty elements from comma-separated list (#40) #207

Job	Run time
Install wxflow and run tests with pytests (3.7)	24s
Install wxflow and run tests with pytests (3.7)	24s
Install wxflow and run tests with pytests (3.7)	24s
Install wxflow and run tests with pytests (3.7)	26s
Install wxflow and run tests with pytests (3.7)	26s
Install wxflow and run tests with pytests (3.8)	23s
Install wxflow and run tests with pytests (3.8)	23s
Install wxflow and run tests with pytests (3.8)	23s
Install wxflow and run tests with pytests (3.8)	23s
Install wxflow and run tests with pytests (3.8)	19s
Install wxflow and run tests with pytests (3.9)	20s
Install wxflow and run tests with pytests (3.9)	23s
Install wxflow and run tests with pytests (3.9)	23s
Install wxflow and run tests with pytests (3.9)	23s
Install wxflow and run tests with pytests (3.9)	23s
Install wxflow and run tests with pytests (3.10)	17s
Install wxflow and run tests with pytests (3.10)	17s
Install wxflow and run tests with pytests (3.10)	31s
Install wxflow and run tests with pytests (3.10)	31s
Install wxflow and run tests with pytests (3.10)	31s
Install wxflow and run tests with pytests (3.11)	19s
Install wxflow and run tests with pytests (3.11)	19s
Install wxflow and run tests with pytests (3.11)	19s
Install wxflow and run tests with pytests (3.11)	19s
Install wxflow and run tests with pytests (3.11)	19s
	9m 29s

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