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# Description This PR adds a `ListItem` enum to our set of AST types. It encodes the two possible expressions inside of list expression: a singular item or a spread. This is similar to the existing `RecordItem` enum. Adding `ListItem` allows us to remove the existing `Expr::Spread` case which was previously used for list spreads. As a consequence, this guarantees (via the type system) that spreads can only ever occur inside lists, records, or as command args. This PR also does a little bit of cleanup in relevant parser code. |
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