DanielXMoore / Civet / 24154115683

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Fix ternary with trailing ? and indented values (#1934)

* Fix ternary with trailing ? and indented values (#1933)

Add new TernaryRest alternative to handle the form:
  condition ?
    then :
    else

Previously, MaybeNestedExpression at the `then` position would
incorrectly parse `then :\n  else` as an implicit object literal
{then: else}, consuming the ternary colon. The fix uses PushIndent
to enter the indented context first, then parses `Expression _ Colon`
followed by another `Nested Expression` for the else branch. At the
pushed indent level, NestedImplicitObjectLiteral cannot match across
the newline boundary, so Expression correctly stops before the colon.

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Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>
Co-authored-by: Daniel X Moore <STRd6@users.noreply.github.com>

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