[llvm] [NFC][ConstraintElimination] Optimize code styles (PR #121422)

[Stephen Senran Zhang via llvm-commits]

zsrkmyn wrote:

This is a pre commit for #121423.

It's better to review the change with 'Hide whitespace' on in the diff page, as it contains indent changes. :-)

https://github.com/llvm/llvm-project/pull/121422