Fixes a false positive for transparent newtype with a non-zero member.

Co-authored-by: Bastian Kauschke <[email protected]>

Expand rustdoc theme chooser x padding

![image](https://user-images.githubusercontent.com/4687791/91057476-d0eea500-e659-11ea-8c9a-e44db937da89.png)
![image](https://user-images.githubusercontent.com/4687791/91057530-e368de80-e659-11ea-9298-fbb00006d91f.png)

But I still think there is room for improvement considering mdbook.

![image](https://user-images.githubusercontent.com/4687791/91057583-f7acdb80-e659-11ea-9dc5-317caed92bc5.png)

CC @GuillaumeGomez @jyn514

…declarations-transparent-nonzero, r=lcnr

Fix another clashing_extern_declarations false positive.

Fixes rust-lang#75739.

Fix another clashing_extern_declarations false positive, this time for transparent newtype with a non-zero member.

r? @lcnr

…_typo, r=petrochenkov

Fix typo in TLS Model in Unstable Book

…er-background-color, r=pickfire

Improve theme button hover background color

Fixes rust-lang#75880.

![Screenshot from 2020-08-25 13-44-01](https://user-images.githubusercontent.com/3050060/91170922-e60b1880-e6d9-11ea-9eb1-61a44cdc28d9.png)
![Screenshot from 2020-08-25 13-43-43](https://user-images.githubusercontent.com/3050060/91170924-e73c4580-e6d9-11ea-969e-616bf4130975.png)

r? @pickfire

Add test for issue rust-lang#27130

rust-lang#27130 seems to be fixed by the llvm 11 update. The issue is marked with needs-test, so here it is. As some historical context, the generated code was fine until 1.38, and remained unoptimized from 1.38 up until the current nightly.

I've also added a pattern matching version that was fine on 1.45.2.

…, r=jyn514

Move to intra doc links for core::ptr::non_null

Helps with rust-lang#75080.

@rustbot modify labels: T-doc, A-intra-doc-links, T-rustdoc

r? @jyn514

…r=ehuss

Fix typo (`thumbv8m.main-none-eabihf` is Mainline)

Fix typo in release notes

Improve help popup

Fixes rust-lang#75623.

The second commit is just a slight improvement: the help popup won't be created until someone presses "?" or ESC. Not a big improvement in itself but considering the low amount of code required, I think it was worth the shot.

r? @jyn514

Should not apply field accessing on enum

Closes rust-lang#75977
But I'm surprised that `x.py test --stage 1` and CI didn't catch this with existing testcase.
r? @estebank