PR Summary

The first fix is that after the yield return, we should move on to the next command
The second fix is that if we findany command, we should not move on to the 'Get-' variant.
These changes mean that we do not run a pipeline (twice!) to find something that was a cache miss. Previously in the pathological case of a script made up of only unique aliases, we would run 2 pipelines for each found alias. This fix avoids both of those pipeline invocations.

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