Transforms the given input range by replacing lines that have @include directive
with the content of the included file. Filenames are looked for in the list
of directories includeDirs.
input must be a range of lines (as given e.g. by std.string.lineSplitter)
Transforms the given input range by replacing lines that have @include directive with the content of the included file. Filenames are looked for in the list of directories includeDirs. input must be a range of lines (as given e.g. by std.string.lineSplitter)