feat: allow field notation to use explicit universe levels#13262
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feat: allow field notation to use explicit universe levels#13262
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This PR extends Lean's syntax to allow explicit universe levels in expressions such as `e.f.{u,v}`, `(f e).g.{u}`, and `e |>.f.{u,v} x y z`. It also changes the syntax of top-level declarations to not allow space between the identifier and the universe level list, and it fixes a bug in the `checkWsBefore` parser where it would not detect whitespace across `optional` parsers.
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This PR extends Lean's syntax to allow explicit universe levels in expressions such as
e.f.{u,v},(f e).g.{u}, ande |>.f.{u,v} x y z. It also changes the syntax of top-level declarations to not allow space between the identifier and the universe level list, and it fixes a bug in thecheckWsBeforeparser where it would not detect whitespace acrossoptionalparsers.Closes #8743