State up-front and center what shape the returned extension will have, without
making the user read through the description and examples.

Rationale: Various frameworks and libraries for different platforms have their
different conventions as to whether an "extension" is ".ext" or just "ext" and
anyone that's had to deal with this ambiguity in the past is always double- or
triple-checking to make sure the function call returns an extension that matches
the expected semantics. Offer the answer to this important question right off
the bat instead of making them dig to find it.

This code was added in 003b2bc to prevent
these headers from overlapping `.out-of-band` side items. That stopped
being a problem when 3f92ff3 switched
rustdoc over to using `float`, rather than `position: absolute`, to
implement this.

…s/Closures

It's now much more like the `-Zhir-stats` output.
- Each line is preceded with `meta-stats`, which makes the provenance
  clearer and allows filtering of the output.
- Sections are now sorted in reverse order of size.
- Column headings avoid the need to repeat the word "bytes" on every line.
- Long numbers now have `_` separators for easier reading.
- Consistent use of '-' within section labels, rather than a mix of '-',
  '_', and ' '.

The code itself is shorter and easier to read thanks to:
- the `stat` macro, which encapsulates each section's encoding, avoids
  some boilerplate, and removes the need for some low-value comments;
- the `stats` vector, which replaces dozens of local variables.

…race, r=tmandry

Adding ignore fuchsia tests for Backtrace, ErrorKind cases

Tests where Backtrace parses are required (invalid since Fuchsia backtraces are not symbolized), and test where ErrorKind is not properly translated from a Fuchsia-style to Unix-style error code

cc. `@djkoloski`

r? `@tmandry`

…, r=tmandry

Adding needs-unwind to nicer-assert-messages compiler ui tests

Tests where unwind is required for asserting on contents of error message

cc. `@djkoloski`

r? `@tmandry`

…bjorn3

Improve `-Zmeta-stats` some more

A follow-up to rust-lang#97384.

r? `@bjorn3`

…=notriddle

Unify "all items" page's sidebar with other pages

Currently, the "all types" page's sidebar doesn't list the different categories of type available. This PR fixes it.

Before:

![Screenshot from 2022-09-20 17-11-15](https://user-images.githubusercontent.com/3050060/191296348-95d8771d-a887-432e-96bd-d5284d87d743.png)

After:

![Screenshot from 2022-09-20 17-11-09](https://user-images.githubusercontent.com/3050060/191296344-8e7318a3-eb51-4037-ae94-7ae2115363ce.png)

r? `@notriddle`

Clarify Path::extension() semantics in docs abstract

State up-front and center what shape the returned extension will have, without making the user read through the description and examples.

This is a doc-only change. There are no changes to the API contract and the clarification is in line with what was already stated/promised in the existing doc text - just clarified, summarized, and served bright and early.

Rationale: Various frameworks and libraries for different platforms have their different conventions as to whether an "extension" is ".ext" or just "ext" and anyone that's had to deal with this ambiguity in the past is always double- or triple-checking to make sure the function call returns an extension that matches the expected semantics. Offer the answer to this important question right off the bat instead of making them dig to find it.

`@rustbot` label +A-docs

…ckh726

Use rebind instead of dummy binder in `SameTypeModuloInfer` relation

Lazy binder usage (sorry, my fault) + assertion in `Binder::dummy`

Fixes rust-lang#101984

…dth, r=GuillaumeGomez

rustdoc: remove unnecessary `max-width` on headers

This code was added in 003b2bc to prevent these headers from overlapping `.out-of-band` side items. That stopped being a problem when 3f92ff3 switched rustdoc over to using `float`, rather than `position: absolute`, to implement this.

…-binary-size, r=tmandry

Adding needs-unwind for tests testing memory size of Futures/Closures

Adding needs-unwind for tests testing memory size of Futures/Closures

cc. `@djkoloski`

r? `@tmandry`

…re, r=tmandry

Adding ignore fuchsia tests for execvp

Adding ignore fuchsia tests for execvp

cc. `@djkoloski`

r? `@tmandry`

Update books

## nomicon

1 commits in d880e6ac2acf133dce640da24b9fb692844f02d4..f53bfa056929217870a5d2df1366d2e7ba35096d
2022-08-24 12:42:34 -0700 to 2022-09-05 07:19:02 -0700
- Small typo (rust-lang/nomicon#379)

## reference

9 commits in f62e93c28323ed9637d0a205a0c256498674a509..a7cdac33ca7356ad49d5c2b5e2c5010889b33eee
2022-08-28 10:01:28 -0700 to 2022-09-19 17:39:58 -0700
- Clarify wording for references. (rust-lang/reference#1223)
- Update Unicode reference to match rustc implementation (rust-lang/reference#1271)
- Add documentation for raw-dylib and link_ordinal (rust-lang/reference#1244)
- Specify guarantees for repr(rust) structs (rust-lang/reference#1152)
- Classify AsyncBlockExpression as ExpressionWithoutBlock (rust-lang/reference#1268)
- Update closure-expr.md (rust-lang/reference#1269)
- Clarify that 0 is a valid multiple of a type's alignment (rust-lang/reference#1260)
- Remove `ne` from derive example (rust-lang/reference#1264)
- Clarify reference on async blocks (rust-lang/reference#1262)

## book

6 commits in 0a5421ceb238357b3634fb75234eba4d1dad643c..f1e5ad844d0c61738006cdef26227beeb136948e
2022-08-28 19:51:04 -0400 to 2022-09-19 09:48:21 -0400
- Fix punctuation in ch05-02
- Ownership move chapter link fix
- Wrong listing number
- Reword text around box
- `Box<T>` instead of "box"
- Update Clippy output in Appendix D

## rust-by-example

2 commits in 03301f8ae55fa6f20f7ea152a517598e6db2cdb7..767a6bd9727a596d7cfdbaeee475e65b2670ea3a
2022-08-14 08:51:44 -0300 to 2022-09-14 09:17:18 -0300
- struct_visibility.md:  Remove unneeded '#[allow(dead_code)]' (rust-lang/rust-by-example#1609)
- Fix assorted typos (rust-lang/rust-by-example#1601)

## rustc-dev-guide

15 commits in 04892c1a6fc145602ac7367945fda9d4ee83c9fb..f587d6e7cddeaa3cf0a33ec1e368df1a408fa0aa
2022-08-29 20:07:51 +0200 to 2022-09-20 07:43:59 +0900
- Update stability guide to use CURRENT_RUSTC_VERSION (rust-lang/rustc-dev-guide#1468)
- Add a note about building `rust-analyzer-proc-macro-srv` (rust-lang/rustc-dev-guide#1467)
- Link from "implementing to new features" to mcp.md (rust-lang/rustc-dev-guide#1465)
- remove stray **
- Explain the new valtree system for type level constants. (rust-lang/rustc-dev-guide#1097)
- fix typos and formatting
- Say "bootstrap" instead of "rustbuild"; the latter is not explained anywhere and is not much more clear.
- Rewrite the section on passing flags to subcommands
- Remove the diagram of all outputs generated by x.py
- "symbol names" => ABI
- Add symbol-addition to the how-to for new features (rust-lang/rustc-dev-guide#1457)
- Fix typo (rust-lang/rustc-dev-guide#1459)
- Document multipart_suggestion derive on SessionSubdiagnostic
- Add reference for updating Windows PATH and fix typo
- Update for removal of RLS (rust-lang/rustc-dev-guide#1450)

## embedded-book

1 commits in befe6840874311635c417cf731377f07234ee373..4ce51cb7441a6f02b5bf9b07b2eb755c21ab7954
2022-07-25 07:51:14 +0000 to 2022-09-15 08:53:09 +0000
- Create CITATION.bib (as per rust-embedded/book#327)  (rust-embedded/book#329)