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Rollup of 13 pull requests#77212

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jonas-schievink wants to merge 36 commits intorust-lang:masterrust-lang/rust:masterfrom

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Commits on Aug 12, 2020

• Explicitly document the size guarantees that Option makes.

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  ltratt

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• Clarify and add guarantee about `transmute`.

  ltratt

  committed
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• Be clear about the reverse `transmute` guarantees.

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• Be clearer about Some/None transmute.

  ltratt

  committed
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• Change notation.

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  ltratt

  and

  RalfJung

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• Add Rust function pointers.

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  ltratt

  and

  RalfJung

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Commits on Aug 17, 2020

• Rename the types for clarity.

  ltratt

  committed
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• Grammar tweak.

  ltratt

  committed
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Commits on Sep 8, 2020

• Point at named argument not found when using `format_args_capture` instead of whole format string

  estebank

  committed
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Commits on Sep 22, 2020

• Add accessors to Command.

  ehuss

  committed
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Commits on Sep 23, 2020

• Update mdBook

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  camelid

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Commits on Sep 24, 2020

• Update cargo

  ehuss

  committed
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• Add `x.py setup`

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  jyn514

  committed
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• Remove std::io::lazy::Lazy in favour of SyncOnceCell

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  m-ou-se

  committed
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• Add test to check stdout flushing during shutdown.

  m-ou-se

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• Drop use of Arc from Stdin and Stdout.

  m-ou-se

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• Remove TrustedLen requirement from BuilderMethods::switch

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  est31

  committed
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• Call ReentrantMutex::init() in stdout().

  m-ou-se

  committed
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• update Miri

  RalfJung

  committed
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Commits on Sep 25, 2020

• Reopen standard streams when they are closed on Unix

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  tmiasko

  committed
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• Add missing code examples on slice iter types

  GuillaumeGomez

  committed
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• Remove stray word from `ClosureKind::extends` docs

  LingMan

  authored
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• Rename `whence` to `span`

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  camelid

  committed
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Commits on Sep 26, 2020

• Rollup merge of #75295 - tmiasko:fds, r=Amanieu

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  jonas-schievink

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• Rollup merge of #75454 - ltratt:option_optimisation_guarantees, r=dtolnay

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  jonas-schievink

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• Rollup merge of #76485 - estebank:format_arg_capture_spans, r=davidtwco

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  jonas-schievink

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• Rollup merge of #76631 - jyn514:x.py-setup, r=Mark-Simulacrum

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  jonas-schievink

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• Rollup merge of #77029 - ehuss:command-access, r=Mark-Simulacrum

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  jonas-schievink

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• Rollup merge of #77076 - GuillaumeGomez:missing-code-examples-slice-iter, r=Dylan-DPC

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  jonas-schievink

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• Rollup merge of #77127 - camelid:update-mdbook, r=Dylan-DPC

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  jonas-schievink

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• Rollup merge of #77129 - ehuss:update-cargo, r=ehuss

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  jonas-schievink

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• Rollup merge of #77154 - fusion-engineering-forks:lazy-stdio, r=dtolnay

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  jonas-schievink

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• Rollup merge of #77161 - est31:swich_len_already_trusted, r=petrochenkov

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  jonas-schievink

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• Rollup merge of #77166 - RalfJung:miri, r=RalfJung

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  jonas-schievink

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• Rollup merge of #77204 - LingMan:patch-3, r=jonas-schievink

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  jonas-schievink

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• Rollup merge of #77207 - camelid:whence-to-span, r=jyn514

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