Rollup of 5 pull requests

[Centril]

Successful merges:

• Suggest using anonymous lifetime in impl Trait return #58919 (Suggest using anonymous lifetime in impl Trait return)
• fixes rust-lang#56766 #59041 (fixesBlank document comment in trait raises error different from with that in function. #56766)
• Fixed URL in cargotest::TEST_REPOS #59586 (Fixed URL in cargotest::TEST_REPOS)
• Print the appveyor agent version at the start of the build #59593 (Print the appveyor agent version at the start of the build)
• Fix small typo #59601 (Fix small typo)

Failed merges:

r? @ghost

[Centril]

@bors r+ p=5

[bors]

📌 Commit ab19e15 has been approved by Centril

[bors]

⌛ Testing commit ab19e15 with merge af188067b15be58ad36015a884acc8385292c8a9...

[bors]

💔 Test failed - checks-travis

[rust-highfive]

The job x86_64-gnu-tools 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.

[00:50:19] [RUSTC-TIMING] rustc test:false 719.769
[00:50:19] Compiling rustc_mir v0.0.0 (/checkout/src/librustc_mir)
[00:50:19] Compiling rustc_typeck v0.0.0 (/checkout/src/librustc_typeck)
[00:50:19] Compiling rustc_lint v0.0.0 (/checkout/src/librustc_lint)
No output has been received in the last 30m0s, this potentially indicates a stalled build or something wrong with the build itself.
Check the details on how to adjust your build configuration on: https://docs.travis-ci.com/user/common-build-problems/#Build-times-out-because-no-output-was-received
The build has been terminated

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)

[Centril]

@bors retry