Remove unnecessary 'as' statement
We can just use `self`, no idea why the `self as io` is there.
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@ -47,7 +47,7 @@
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use prelude::*;
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use prelude::*;
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use io::{self as io, Cursor};
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use io::{self, Cursor};
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use core::fmt::{self, Display, Formatter};
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use core::fmt::{self, Display, Formatter};
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use core::cmp::{self, Ordering};
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use core::cmp::{self, Ordering};
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