Auto merge of rust-lang#29647 - goyox86:goyox86/rustfmting-librustc_f…

…rontII, r=nrc

Hi Rustaceans!

This is the second take  on running latest rustfmt on librustc_front!

This is the same in rust-lang#29075 but cleaned. All fixups have been applied.

//cc @nrc

1.4.0 release

1.3.0 release

1.2.0 release

1.1.0 release

1.0.0 release

1.0.0-alpha.2 release

1.0.0-alpha release

0.12.0 release