making the IR dumps much nicer.
This is part 2/3 of the path to making dialect types more nice. Part 3/3 will
slightly generalize the set of characters allowed in pretty types and make it
more principled.
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PiperOrigin-RevId: 242249955
Mainly a missing dependency caused the tests to pass if one already built
the repo, but not from a clean (or incremental) build.
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PiperOrigin-RevId: 241852313
Chris Lattner