[llvm] [llvm-lit] Adding -e option to lit's built-in cat command (PR #102061)

[James Henderson via llvm-commits]

https://github.com/jh7370 commented:

Change looks basically fine to me (once tests are updated). One question I do have is how many tests actually use this functionality and do they really need to?

https://github.com/llvm/llvm-project/pull/102061