From type/IO/Spec/Win32

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method dir-sep(--> Str:D)

Returns the string ｢\｣ representing canonical directory separator character.

IO::Spec::Win32.dir-sep.say; # OUTPUT: «\␤» 

From type/IO/Spec/Unix

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method dir-sep(--> Str:D)

Returns the string "/" representing canonical directory separator character.

IO::Spec::Unix.dir-sep.say; # OUTPUT: «/␤»