Stabilize split_ascii_whitespace

[SimonSapin]

Tracking issue FCP to merge: #48656 (comment)

Closes #48656

[Centril]

r? @Centril

@bors r+ rollup

[bors]

📌 Commit 6a01f8a has been approved by Centril

[bors]

⌛ Testing commit 6a01f8a with merge 566914f73fd8df7cc3486304b6a1b602fc8548ec...

[bors]

💔 Test failed - checks-travis

[rust-highfive]

Your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

travis_fold:end:before_install.3
travis_fold:start:install
travis_time:start:1826c6a0
$ case "$TRAVIS_OS_NAME" in linux) travis_retry curl -fo $HOME/stamp https://s3-us-west-1.amazonaws.com/rust-lang-ci2/rust-ci-mirror/2017-03-17-stamp-x86_64-unknown-linux-musl && chmod +x $HOME/stamp && export PATH=$PATH:$HOME ;; osx) if [[ "$RUST_CHECK_TARGET" == dist ]]; then travis_retry brew update && travis_retry brew install xz && travis_retry brew install swig; fi && travis_retry curl -fo /usr/local/bin/sccache https://s3-us-west-1.amazonaws.com/rust-lang-ci2/rust-ci-mirror/2018-04-02-sccache-x86_64-apple-darwin && chmod +x /usr/local/bin/sccache && travis_retry curl -fo /usr/local/bin/stamp https://s3-us-west-1.amazonaws.com/rust-lang-ci2/rust-ci-mirror/2017-03-17-stamp-x86_64-apple-darwin && chmod +x /usr/local/bin/stamp && travis_retry curl -f http://releases.llvm.org/7.0.0/clang+llvm-7.0.0-x86_64-apple-darwin.tar.xz | tar xJf - && export CC=`pwd`/clang+llvm-7.0.0-x86_64-apple-darwin/bin/clang && export CXX=`pwd`/clang+llvm-7.0.0-x86_64-apple-darwin/bin/clang++ && export AR=ar ;; esac
curl: (56) Recv failure: Connection reset by peer
The command "curl -f http://releases.llvm.org/7.0.0/clang+llvm-7.0.0-x86_64-apple-darwin.tar.xz" failed. Retrying, 2 of 3.
clang+llvm-7.0.0-x86_64-apple-darwin/bin/find-all-symbols: Lzma library error: Corrupted input data
tar: Error exit delayed from previous errors.
travis_time:end:1826c6a0:start=1549089575157890000,finish=1549089604164001000,duration=29006111000
The command "case "$TRAVIS_OS_NAME" in linux) travis_retry curl -fo $HOME/stamp https://s3-us-west-1.amazonaws.com/rust-lang-ci2/rust-ci-mirror/2017-03-17-stamp-x86_64-unknown-linux-musl && chmod +x $HOME/stamp && export PATH=$PATH:$HOME ;; osx) if [[ "$RUST_CHECK_TARGET" == dist ]]; then travis_retry brew update && travis_retry brew install xz && travis_retry brew install swig; fi && travis_retry curl -fo /usr/local/bin/sccache https://s3-us-west-1.amazonaws.com/rust-lang-ci2/rust-ci-mirror/2018-04-02-sccache-x86_64-apple-darwin && chmod +x /usr/local/bin/sccache && travis_retry curl -fo /usr/local/bin/stamp https://s3-us-west-1.amazonaws.com/rust-lang-ci2/rust-ci-mirror/2017-03-17-stamp-x86_64-apple-darwin && chmod +x /usr/local/bin/stamp && travis_retry curl -f http://releases.llvm.org/7.0.0/clang+llvm-7.0.0-x86_64-apple-darwin.tar.xz | tar xJf - && export CC=`pwd`/clang+llvm-7.0.0-x86_64-apple-darwin/bin/clang && export CXX=`pwd`/clang+llvm-7.0.0-x86_64-apple-darwin/bin/clang++ && export AR=ar ;; esac" failed and exited with 1 during .
Your build has been stopped.

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[Centril]

@bors retry

[bors]

⌛ Testing commit 6a01f8a with merge 3e58dab...

[bors]

☀️ Test successful - checks-travis, status-appveyor
Approved by: Centril
Pushing 3e58dab to master...