[llvm-branch-commits] [llvm] [YAMLParser] Unfold multi-line scalar values (PR #70898)

[Igor Kudrin via llvm-branch-commits]

igorkudrin wrote:

> I don't mean to make existing debt your problem, but if it isn't too much work could you post a pre-patch that just adds the `FileCheck`s to the existing tests where the behavior changes, so the test diff is more self-documenting?

* Added #71774 for the tests
* Also added a unittest `YAMLParser.UnfoldsScalarValue` to check various combinations of line breaks and other characters. It seems like a `gtest`-based test suits better than a lit one.

https://github.com/llvm/llvm-project/pull/70898