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4d016c781a
rustc_codegen_ssa: Remove trailing spaces in Display impl for CguReuse
Otherwise errors will look like this:
error: CGU-reuse for `cgu_invalidated_via_import-bar` is `PreLto ` but should be `PostLto `
### Background
I noticed that error messages looked wonky while investigating if
529047cfc3/compiler/rustc_codegen_ssa/src/assert_module_sources.rs (L281-L287)
should not be wrapped by `sess.emit_err(...)`. Right now it looks like the error is accidentally ignored. It looks like 706452eba7 might have accidentally started ignoring it (by removing the `diag.span_err()` call). I am still investigating, but regardless of the outcome we should fix the trailing whitespace.
Please read the rustc-dev-guide chapter on Backend Agnostic Codegen.