Rollup of 6 pull requests

[kennytm]

Successful merges:

• Warn on unused results for operation methods on nums #59839 (Warn on unused results for operation methods on nums)
• Update fonts used by rustdoc #60146 (Update fonts used by rustdoc)
• Warn when ignore-tidy-linelength is present, but no lines are too long #60169 (Warn when ignore-tidy-linelength is present, but no lines are too long)
• Disallow double trailing newlines in tidy #60172 (Disallow double trailing newlines in tidy)
• Promote rust comments to rustdoc #60177 (Promote rust comments to rustdoc)
• Update cargo, books #60180 (Update cargo, books)

Failed merges:

r? @ghost

[kennytm]

@bors r+ p=6

[bors]

📌 Commit 2a2198c has been approved by kennytm

[bors]

⌛ Testing commit 2a2198c with merge 45f8c78ed77c39d6a0954e6c02038964c2da105b...

[bors]

💔 Test failed - checks-travis

[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.

[00:03:58] [TIMING] ToolBuild { compiler: Compiler { stage: 0, host: "x86_64-unknown-linux-gnu" }, target: "x86_64-unknown-linux-gnu", tool: "tidy", path: "src/tools/tidy", mode: ToolBootstrap, is_optional_tool: false, source_type: InTree, extra_features: [] } -- 41.008
[00:03:58] travis_fold:start:tidy
travis_time:start:tidy
tidy check
[00:03:59] tidy error: /checkout/src/test/run-pass/issues/issue-16278.rs: ignoring CR characters unnecessarily
[00:04:00] some tidy checks failed
[00:04:00] 
[00:04:00] 
[00:04:00] 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"
[00:04:00] 
[00:04:00] 
[00:04:00] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test src/tools/tidy
[00:04:00] Build completed unsuccessfully in 0:00:44
[00:04:00] Build completed unsuccessfully in 0:00:44
[00:04:00] Makefile:67: recipe for target 'tidy' failed
[00:04:00] make: *** [tidy] Error 1
The command "stamp sh -x -c "$RUN_SCRIPT"" exited with 2.
travis_time:start:316a8e09
$ date && (curl -fs --head https://google.com | grep ^Date: | sed 's/Date: //g' || true)
Tue Apr 23 06:38:35 UTC 2019
---
travis_time:end:00190d20:start=1556001515783254931,finish=1556001515789960191,duration=6705260
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:0d49cf40
$ 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:00115a72
travis_time:start:00115a72
$ 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:263faca0
$ 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)

[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:12c87328:start=1555995503784732566,finish=1555995612628157091,duration=108843424525
$ 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
---

[00:03:23] travis_fold:start:tidy
travis_time:start:tidy
tidy check
[00:03:24] tidy error: /checkout/src/test/run-pass/issues/issue-16278.rs: ignoring CR characters unnecessarily
[00:03:25] some tidy checks failed
[00:03:25] 
[00:03:25] 
[00:03:25] 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"
[00:03:25] 
[00:03:25] 
[00:03:25] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test src/tools/tidy
[00:03:25] Build completed unsuccessfully in 0:00:48
[00:03:25] Build completed unsuccessfully in 0:00:48
[00:03:25] make: *** [tidy] Error 1
[00:03:25] Makefile:67: recipe for target 'tidy' failed
The command "stamp sh -x -c "$RUN_SCRIPT"" exited with 2.
travis_time:start:04d59a77
$ date && (curl -fs --head https://google.com | grep ^Date: | sed 's/Date: //g' || true)
Tue Apr 23 05:03:47 UTC 2019
---
travis_time:end:10bc4920:start=1555995828395016571,finish=1555995828399875913,duration=4859342
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:06a6b384
$ 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:09e2cef0
travis_time:start:09e2cef0
$ 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:0d3d95b6
$ 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)