…re conservative

In particular, this supports build directories within an unrelated git repository.

As a side effect, it will fall back to the old logic when the source directory is being built from a tarball within an unrelated git repository.
However, that second case is unsupported and untested; we reserve the right to break it in the future.

…changes

(cherry picked from commit e5e4b85feba6463310d0fc0c27e8ff38891efac3)

This test fails when targeting aarch64 Android. Instead of adding yet
another architecture here (and one that's increasingly more common
as the host), let's replace the growing list of architectures with
ignore-cross-compile.

This DOM cleanup changes the color of the triangle, from blue to black, but
since it's still a different color from the link it's next to, it should
still be noticeable.

…b-args-to-gdb-cmd, r=Mark-Simulacrum

Fix gdb-cmd for rust-gdbgui

With cs01/gdbgui#198, the way that gdbgui arguments were specified changed. I've tested this with program generated from `cargo new --bin` and it worked as gdbgui should.

Closes rust-lang#76383.

…-exact-size-iterator, r=thomcc

`EscapeAscii` is not an `ExactSizeIterator`

Fixes rust-lang#99878

Do we want/need `EscapeAscii` to be an `ExactSizeIterator`? I guess we could precompute the length of the output if so?

…n, r=GuillaumeGomez

rustdoc: remove weird `<a href="#">` wrapper around unsafe triangle

This DOM cleanup changes the color of the triangle, from blue to black, but since it's still a different color from the link it's next to, it should still be noticeable.

# Before

![image](https://user-images.githubusercontent.com/1593513/193352428-929b3026-acc3-448e-9bac-44dddf206b1d.png)

# After

![image](https://user-images.githubusercontent.com/1593513/193352500-2f7a0112-b478-4cc4-9ddb-32ba11575530.png)

…acrum

Make the `config.src` handling for downloadable bootstrap more conservative

In particular, this supports build directories within an unrelated git repository. Fixes rust-lang#102562.

As a side effect, it will fall back to the old logic when the source directory is being built from a tarball within an unrelated git repository. However, that second case is unsupported and untested; we reserve the right to break it in the future.

`@cr1901` can you confirm this fixes your problem?
cc `@kleisauke,` I believe this will also fix your issue (although your use case still isn't supported).

r? `@Mark-Simulacrum`

…trap_readme_readability, r=Mark-Simulacrum

Improve readability of bootstrap's README

Improve readability of bootstrap's README by adding commas & minor changes

test: run-make: skip when cross-compiling

This test fails when targeting aarch64 Android. Instead of adding yet another architecture here (and one that's increasingly more common as the host), let's replace the growing list of architectures with ignore-cross-compile.

… r=GuillaumeGomez

rustdoc: remove mobile topbar from source pages instead of hiding it