Date.parse cannot return an abrupt completion when called with a String value

[anba]

https://tc39.github.io/ecma262/#sec-date-value, step 4.b.ii

1. Let tv be the result of parsing v as a date, in exactly the same manner as for the parse method (20.3.3.2). If the parse resulted in an abrupt completion, tv is the Completion Record.
2. ReturnIfAbrupt(tv).

should instead assert that calling Date.parse will never result in an abrupt completion:

1. Assert: The next step never returns an abrupt completion because v is a String value.
2. Let tv be the result of parsing v as a date, in exactly the same manner as for the parse method (20.3.3.2).

[littledan]

Looks right to me. Anyone want to make a patch?

[littledan]

Looks right to me. Anyone want to make a patch?