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Updated RELEASES.md for 1.37.0 #62653

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Version 1.37.0 (2019-08-15)
==========================

Language
--------
- `#[must_use]` will now warn if the type is contained in a [tuple][61100],
[`Box`][62228], or an [array][62235] and unused.
- [You can now use the `cfg` and `cfg_attr` attributes on
generic parameters.][61547]
- [You can now use enum variants through type alias.][61682] e.g. You can
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This arguably is the most important language change so I would put it first. Then I would mention consts, then Repr align. Also, I would use an example with Self here since that is likely the most common use.

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I think that arbitrary reordering does not provide much benefit in the RELEASES.md document. This is really the point of the blog post to highlight specific features and guide a user through a new release.

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The reordering is not arbitrary, it's based on the relative importance of the features by estimating how many users will be affected and benefit from each one.

This is really the point of the blog post to highlight specific features and guide a user through a new release.

If so then we can dispense with examples in the release notes altogether. I think the blog post does a good job of talking in-depth about the most important bits but some users will read the release notes as well and we should use that opportunity wisely.

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The reordering is not arbitrary, it's based on the relative importance of the features by estimating how many users will be affected and benefit from each one.

This would be important if the entire section was longer, but it isn't. It fits entirely on the page on all devices except mobile. Personally I find this to be pointless busy work, and I'm not going to do it. If you think it's that important feel free to make a separate PR.

write the following:
```rust
type MyOption = Option<u8>;

fn increment_or_zero(x: MyOption) -> u8 {
match x {
MyOption::Some(y) => y + 1,
MyOption::None => 0,
}
}
```
- [You can now use `_` as an identifier for consts.][61347] e.g. You can write
`const _: u32 = 5;`.
- [You can now use `#[repr(align)]` on enums.][61229]
- [The `?`/_"Kleene"_ macro operator is now available in the
2015 edition.][60932]

Compiler
--------
- [You can now enable Profile-Guided Optimization with the `-C profile-generate`
and `-C profile-use` flags.][61268] For more information on how to use profile
guided optimization, please refer to the [rustc book][rustc-book-pgo].
- [The `rust-lldb` wrapper script should now work again.][61827]

Libraries
---------
- [`mem::MaybeUninit<T>` is now ABI-compatible with `T`.][61802]

Stabilized APIs
---------------
- [`BufReader::buffer`]
- [`BufWriter::buffer`]
- [`Cell::from_mut`]
- [`Cell<[T]>::as_slice_of_cells`][`Cell<slice>::as_slice_of_cells`]
- [`DoubleEndedIterator::nth_back`]
- [`Option::xor`]
- [`Wrapping::reverse_bits`]
- [`i128::reverse_bits`]
- [`i16::reverse_bits`]
- [`i32::reverse_bits`]
- [`i64::reverse_bits`]
- [`i8::reverse_bits`]
- [`isize::reverse_bits`]
- [`slice::copy_within`]
- [`u128::reverse_bits`]
- [`u16::reverse_bits`]
- [`u32::reverse_bits`]
- [`u64::reverse_bits`]
- [`u8::reverse_bits`]
- [`usize::reverse_bits`]

Cargo
-----
- [`Cargo.lock` files are now included when publishing by default for crates
with executables.][cargo/7026]
- [You can now specify `default-run="foo"` in `[package]` to specify the
default executable to use for `cargo run`.][cargo/7056]

Misc
----

Compatibility Notes
-------------------
- [Using `...` for inclusive range patterns will now warn by default.][61342]
Please transition your code to using the `..=` syntax for inclusive
ranges instead.
- [Using a trait object without the `dyn` will now warn by default.][61203]
Please transition your code to use `dyn Trait` for trait objects instead.

[62228]: https://github.com/rust-lang/rust/pull/62228/
[62235]: https://github.com/rust-lang/rust/pull/62235/
[61802]: https://github.com/rust-lang/rust/pull/61802/
[61827]: https://github.com/rust-lang/rust/pull/61827/
[61547]: https://github.com/rust-lang/rust/pull/61547/
[61682]: https://github.com/rust-lang/rust/pull/61682/
[61268]: https://github.com/rust-lang/rust/pull/61268/
[61342]: https://github.com/rust-lang/rust/pull/61342/
[61347]: https://github.com/rust-lang/rust/pull/61347/
[61100]: https://github.com/rust-lang/rust/pull/61100/
[61203]: https://github.com/rust-lang/rust/pull/61203/
[61229]: https://github.com/rust-lang/rust/pull/61229/
[60932]: https://github.com/rust-lang/rust/pull/60932/
[cargo/7026]: https://github.com/rust-lang/cargo/pull/7026/
[cargo/7056]: https://github.com/rust-lang/cargo/pull/7056/
[`BufReader::buffer`]: https://doc.rust-lang.org/std/io/struct.BufReader.html#method.buffer
[`BufWriter::buffer`]: https://doc.rust-lang.org/std/io/struct.BufWriter.html#method.buffer
[`Cell::from_mut`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.from_mut
[`Cell<slice>::as_slice_of_cells`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_slice_of_cells
[`DoubleEndedIterator::nth_back`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.nth_back
[`Option::xor`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.xor
[`RefCell::try_borrow_unguarded`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_unguarded
[`Wrapping::reverse_bits`]: https://doc.rust-lang.org/std/num/struct.Wrapping.html#method.reverse_bits
[`i128::reverse_bits`]: https://doc.rust-lang.org/std/primitive.i128.html#method.reverse_bits
[`i16::reverse_bits`]: https://doc.rust-lang.org/std/primitive.i16.html#method.reverse_bits
[`i32::reverse_bits`]: https://doc.rust-lang.org/std/primitive.i32.html#method.reverse_bits
[`i64::reverse_bits`]: https://doc.rust-lang.org/std/primitive.i64.html#method.reverse_bits
[`i8::reverse_bits`]: https://doc.rust-lang.org/std/primitive.i8.html#method.reverse_bits
[`isize::reverse_bits`]: https://doc.rust-lang.org/std/primitive.isize.html#method.reverse_bits
[`slice::copy_within`]: https://doc.rust-lang.org/std/primitive.slice.html#method.copy_within
[`u128::reverse_bits`]: https://doc.rust-lang.org/std/primitive.u128.html#method.reverse_bits
[`u16::reverse_bits`]: https://doc.rust-lang.org/std/primitive.u16.html#method.reverse_bits
[`u32::reverse_bits`]: https://doc.rust-lang.org/std/primitive.u32.html#method.reverse_bits
[`u64::reverse_bits`]: https://doc.rust-lang.org/std/primitive.u64.html#method.reverse_bits
[`u8::reverse_bits`]: https://doc.rust-lang.org/std/primitive.u8.html#method.reverse_bits
[`usize::reverse_bits`]: https://doc.rust-lang.org/std/primitive.usize.html#method.reverse_bits
[rustc-book-pgo]: https://doc.rust-lang.org/rustc/profile-guided-optimization.html


Version 1.36.0 (2019-07-04)
==========================

Expand Down Expand Up @@ -39,7 +157,7 @@ Stabilized APIs
- [`mem::MaybeUninit`]
- [`pointer::align_offset`]
- [`future::Future`]
- [`task::Context`]
- [`task::Context`]
- [`task::RawWaker`]
- [`task::RawWakerVTable`]
- [`task::Waker`]
Expand Down