Minor: avoid a copy in Expr::unalias #8588
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Which issue does this PR close?
N/A
Rationale for this change
While reviewing the excellent PR from #7942 I noticed we can avoid a (deep) copy in the
Expr::unaliascode without an API changeWhat changes are included in this PR?
Avoid a copy in
Expr::unaliasAre these changes tested?
exisiting tests
Are there any user-facing changes?
No