# Functions
ContainsRelativePathSegments reports whether $pth contains '.' or '..' segments.
ForEachAbsolutePathSegment calls fn for each segment of pth, adjacent '/' characters are treated as a single '/' character.
ForEachPathSegment calls fn for each segment of pth, adjacent '/' characters are treated as a single '/' character.
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GetPathSegments returns the segments of pth, adjacent '/' characters are treated as a single '/' character.