[ui tests]: Normalize away THIR end span for output stability #151693
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Spans for the `offset_of!` builtin macro point into an arbitrary place in `core::mem`. This means that the test has to be re-blessed whenever `core/src/mem/mod.rs` line numbers change. Ideally, Span printing would be smarter and wouldn't show an end span if it came from a different crate than the start span (or maybe truncated the span to the last place in the start's crate). But that's a more involved fix and this avoids the immediate problem.
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Spans for the
offset_of!builtin macro point into an arbitrary place incore::mem. This means that the test has to be re-blessed whenevercore/src/mem/mod.rsline numbers change.Ideally, Span printing would be smarter and wouldn't show an end span if it came from a different crate than the start span (or maybe truncated the span to the last place in the start's crate). But that's a more involved fix and this avoids the immediate problem.
For transparency: This PR is mostly to make Ferrocene's CI break less often. But I expect it to also be useful upstream.