Rollup of 10 pull requests

[Centril]

Successful merges:

• keyword docs for else and inkeyword docs for else and in. #67749 (keyword docs for else and inkeyword docs for else and in.)
• clean up E0308 explanation #69139 (clean up E0308 explanation)
• Erase regions in writeback #69189 (Erase regions in writeback)
• Use smaller discriminants for generators #69837 (Use smaller discriminants for generators)
• Expansion-driven outline module parsing #69838 (Expansion-driven outline module parsing)
• Miri error reform #69839 (Miri error reform)
• Make methods declared by newtype_index macro const #69899 (Make methods declared by newtype_index macro const)
• Remove some imports to the rustc crate #69920 (Remove some imports to the rustc crate)
• Fix repr pretty display #70075 (Fix repr pretty display)
• Tidy: fix running rustfmt twice #70106 (Tidy: fix running rustfmt twice)

Failed merges:

• Allow hir().find to return None #70051 (Allow hir().find to return None)
• Expand: nix all fatal errors #70074 (Expand: nix all fatal errors)

r? @ghost

[bors]

⌛ Testing commit b6f61a1 with merge b000ebb1f96ec8454e1ae36aed95c1a43739e60c...

[rust-highfive]

Your PR failed (pretty log, raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

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[bors]

💔 Test failed - checks-azure

[pietroalbini]

@bors retry

Let's hope this is spurious, but I fear it's not.

[bors]

⌛ Testing commit b6f61a1 with merge a5686cd4a00fdd123b6955f0a7ea0767cc733275...

[rust-highfive]

Your PR failed (pretty log, 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.

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 @rust-lang/infra. (Feature Requests)

[bors]

💔 Test failed - checks-azure