MA0151 handles backslashs in expressions #1346

Job	Run time
compute_package_version	3s
check_documentation	1m 1s
build_and_test (ubuntu-latest, Release, roslyn3.8)	2m 49s
build_and_test (ubuntu-latest, Release, roslyn4.2)	3m 3s
build_and_test (ubuntu-latest, Release, roslyn4.4)	2m 58s
build_and_test (ubuntu-latest, Release, roslyn4.6)	3m 8s
build_and_test (ubuntu-latest, Release, roslyn4.8)	2m 59s
build_and_test (ubuntu-latest, Release, default)	2m 51s
build_and_test (windows-latest, Release, roslyn3.8)	7m 29s
build_and_test (windows-latest, Release, roslyn4.2)	6m 57s
build_and_test (windows-latest, Release, roslyn4.4)	7m 19s
build_and_test (windows-latest, Release, roslyn4.6)	7m 44s
build_and_test (windows-latest, Release, roslyn4.8)	7m 34s
build_and_test (windows-latest, Release, default)	7m 1s
create_nuget	2m 26s
validate_nuget	49s
deploy	20s
create_release	13s
	1h 6m 44s

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