Fix spans for macros

[kyeah]

Fixes #28424 (item macros), #30067 (impl item macros), and pattern macros.

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @nikomatsakis (or someone else) soon.

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[sanxiyn]

Shouldn't it be last_span.hi instead of span.hi?

[kyeah]

Ah yep, just pushed a quick fix.

[sanxiyn]

Failed tidy. (I know this can be annoying. I apologize.)

[sanxiyn]

@bors r+

[bors]

📌 Commit 920120e has been approved by sanxiyn

[bors]

⌛ Testing commit 920120e with merge 323781c...

[bors]

💔 Test failed - auto-mac-64-opt

[sanxiyn]

@bors retry

[bors]

⚡ Previous build results for auto-linux-cross-opt, auto-mac-32-opt, auto-mac-64-nopt-t, auto-win-msvc-32-opt are reusable. Rebuilding only auto-linux-32-nopt-t, auto-linux-32-opt, auto-linux-64-debug-opt, auto-linux-64-nopt-t, auto-linux-64-opt, auto-linux-64-x-android-t, auto-linux-musl-64-opt, auto-mac-64-opt, auto-win-gnu-32-nopt-t, auto-win-gnu-32-opt, auto-win-gnu-64-nopt-t, auto-win-gnu-64-opt, auto-win-msvc-64-opt...

[bors]

☀️ Test successful - auto-linux-32-nopt-t, auto-linux-32-opt, auto-linux-64-debug-opt, auto-linux-64-nopt-t, auto-linux-64-opt, auto-linux-64-x-android-t, auto-linux-cross-opt, auto-linux-musl-64-opt, auto-mac-32-opt, auto-mac-64-nopt-t, auto-mac-64-opt, auto-win-gnu-32-nopt-t, auto-win-gnu-32-opt, auto-win-gnu-64-nopt-t, auto-win-gnu-64-opt, auto-win-msvc-32-opt, auto-win-msvc-64-opt