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* Initial implementation of variadic tuple types * Accept new baselines * Handle variadic elements in tuple type inference * Special case inference between tuples with matching structure * Restore check that rest element is last element * Handle variadic tuples in relationship checking * Accept new baselines * Infer readonly constraints when inferring from readonly tuples * Fix lint issues * T assignable to readonly [...T] and [...T] assignable to T * Consistent tuple normalization * Create variadic tuple types from array literal expressions * Accept new baselines * Array literals have tuple types when contextual type is readonly * Accept new baselines * Optional elements before required elements become required elements * Update logic for rest parameters and spread arguments * Revert special case of contextual readonly array type * Accept new baselines * Fix lint issue * Switch entirely to createTupleType based on element flags * Don't infer readonly tuple types when inferring to variadic elements * Handle mapped types applied to generic tuple types * Handle constraint of indexed access type with generic tuple type * Accept new baselines * Address CR feedback * Simplify indexed access types involving generic tuple types * Propagate checkMode into getSpreadArgumentType * Guard against missing globalArrayType * Inference to [...T, ...U] based on implied arity of T * Accept new baselines * Add tests * Emit .d.ts from tests * Address CR feedback