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Document rustc version requirement

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David Tolnay 2019-05-01 19:04:31 -07:00
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@ -12,6 +12,8 @@ This crate provides fast functions for printing integer primitives to an
See also [`dtoa`] for printing floating point primitives.
*Version requirement: rustc 1.0+*
[`io::Write`]: https://doc.rust-lang.org/std/io/trait.Write.html
[`fmt::Write`]: https://doc.rust-lang.org/core/fmt/trait.Write.html
[libcore]: https://github.com/rust-lang/rust/blob/b8214dc6c6fc20d0a660fb5700dca9ebf51ebe89/src/libcore/fmt/num.rs#L201-L254