Merge RFC 573 which amends RFC 544 to update the integer suffixes.

Author: nikomatsakis

README.md

@@ -41,6 +41,7 @@ the direction the language is evolving in.
 * [0505-api-comment-conventions.md](text/0505-api-comment-conventions.md)
 * [0509-collections-reform-part-2.md](text/0509-collections-reform-part-2.md)
 * [0517-io-os-reform.md](text/0517-io-os-reform.md)
+* [0544-rename-int-uint.md](text/0544-rename-int-uint.md)
 * [0560-integer-overflow.md](text/0560-integer-overflow.md)
 * [0563-remove-ndebug.md](text/0563-remove-ndebug.md)
 * [0572-rustc-attribute.md](text/0572-rustc-attribute.md)

text/0544-rename-int-uint.md

@@ -1,6 +1,6 @@
 - Start Date: 2014-12-28
-- RFC PR #: https://github.com/rust-lang/rfcs/pull/544
-- Rust Issue #: https://github.com/rust-lang/rust/issues/20639
+- RFC PR #: [rust-lang/rfcs#544](https://github.com/rust-lang/rfcs/pull/544)
+- Rust Issue #: [rust-lang/rust#20639](https://github.com/rust-lang/rust/issues/20639)
 
 # Summary
 
@@ -240,3 +240,11 @@ There are other alternatives not covered in this RFC. Please refer to this RFC's
 # Unresolved questions
 
 None. Necessary decisions about Rust's general integer type policies have been made in [Restarting the `int/uint` Discussion](http://discuss.rust-lang.org/t/restarting-the-int-uint-discussion/1131).
+
+# History
+
+Amended by [RFC 573][573] to change the suffixes from `is` and `us` to
+`isize` and `usize`. Tracking issue for this amendment is
+[rust-lang/rust#22496](https://github.com/rust-lang/rust/issues/22496).
+
+[573]: https://github.com/rust-lang/rfcs/pull/573