Run rustfmt on some libsyntax files

[ia0]

As part of #62008, run rustfmt on:

• src/libsyntax/ext/tt/macro_rules.rs
• src/libsyntax/ext/tt/quoted.rs

There is no semantic change. To fix potential merge conflicts, simply choose the other side then run rustfmt and fix any tidy check (like line length).

[rust-highfive]

r? @petrochenkov

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[rust-highfive]

The job x86_64-gnu-llvm-6.0 of 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_time:end:06f1d820:start=1561248085549399052,finish=1561248176263569863,duration=90714170811
$ git checkout -qf FETCH_HEAD
travis_fold:end:git.checkout

Encrypted environment variables have been removed for security reasons.
See https://docs.travis-ci.com/user/pull-requests/#pull-requests-and-security-restrictions
$ export SCCACHE_BUCKET=rust-lang-ci-sccache2
$ export SCCACHE_REGION=us-west-1
$ export GCP_CACHE_BUCKET=rust-lang-ci-cache
$ export AWS_ACCESS_KEY_ID=AKIA46X5W6CZEJZ6XT55
---

[00:03:57] travis_fold:start:tidy
travis_time:start:tidy
tidy check
[00:03:57] tidy error: /checkout/src/libsyntax/ext/tt/macro_rules.rs:33: line longer than 100 chars
[00:04:02] some tidy checks failed
[00:04:02] 
[00:04:02] 
[00:04:02] command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/tidy" "/checkout/src" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "--no-vendor" "--quiet"
[00:04:02] 
[00:04:02] 
[00:04:02] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test src/tools/tidy
[00:04:02] Build completed unsuccessfully in 0:01:16
---
travis_time:end:07486be4:start=1561248428359541955,finish=1561248428364344781,duration=4802826
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:1be2a568
$ ln -s . checkout && for CORE in obj/cores/core.*; do EXE=$(echo $CORE | sed 's|obj/cores/core\.[0-9]*\.!checkout!\(.*\)|\1|;y|!|/|'); if [ -f "$EXE" ]; then printf travis_fold":start:crashlog\n\033[31;1m%s\033[0m\n" "$CORE"; gdb --batch -q -c "$CORE" "$EXE" -iex 'set auto-load off' -iex 'dir src/' -iex 'set sysroot .' -ex bt -ex q; echo travis_fold":"end:crashlog; fi; done || true
travis_fold:end:after_failure.4
travis_fold:start:after_failure.5
travis_time:start:02a6b1ae
travis_time:start:02a6b1ae
$ cat ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers || true
cat: ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers: No such file or directory
travis_fold:end:after_failure.5
travis_fold:start:after_failure.6
travis_time:start:174e2d30
$ dmesg | grep -i kill

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

[petrochenkov]

The plan is to format the repo in a more centralized and automated way, and discourage separate formatting PRs until that.
I'm going to merge this as an exception to avoid hindering the work in #62008.

@bors r+

[bors]

📌 Commit 0aeab41 has been approved by petrochenkov

[bors]

⌛ Testing commit 0aeab41 with merge 85ed21e...

[bors]

☀️ Test successful - checks-travis, status-appveyor
Approved by: petrochenkov
Pushing 85ed21e to master...