Dotty

Fix line and path separators in test #36351

Job	Run time
test_windows_fast	19m 44s
MiMa	10m 33s
test	30m 54s
community_build_a	47m 38s
community_build_c	56m 57s
community_build_b	1h 20m 7s
build-msi-package	0s
test_sbt	18m 19s
build-sdk-package / build	10m 24s
test_scala2_library_tasty	0s
test_non_bootstrapped	0s
test_windows_full	0s
test_java8	0s
test-msi-package	0s
build-chocolatey-package / build	24s
test-chocolatey-package	0s
publish_release	0s
publish_nightly	0s
nightly_documentation	0s
open_issue_on_failure	0s
	4h 35m 0s

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