Remove double underscore #380

Job	Run time
TestPoll	36s
Test (ubuntu-latest)	51s
TestWakerPipe	36s
Test (macos-latest)	1m 45s
Clippy	16s
Test (windows-latest)	1m 32s
Docs	11s
MinimalVersions (ubuntu-latest)	23s
MSRV (ubuntu-latest)	13s
MinimalVersions (macos-latest)	32s
Nightly	22s
MSRV (macos-latest)	22s
MinimalVersions (windows-latest)	38s
MSRV (windows-latest)	34s
CheckTargets	1m 28s
Check (aarch64-apple-ios)	31s
Rustfmt	10s
Check (aarch64-apple-tvos)	31s
Sanitizer (address)	1m 2s
Check (aarch64-unknown-openbsd)	33s
Sanitizer (leak)	49s
Check (arm64_32-apple-watchos)	32s
Sanitizer (memory)	1m 40s
Check (armv7-sony-vita-newlibeabihf)	33s
Sanitizer (thread)	52s
Check (sparcv9-sun-solaris)	30s
Check (x86_64-pc-solaris)	32s
Check (x86_64-unknown-dragonfly)	31s
Check (x86_64-unknown-openbsd)	33s
Passed	1s
	19m 39s

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