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Fix open-classes.md #18630

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Oct 2, 2023
Merged

Fix open-classes.md #18630

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2 changes: 1 addition & 1 deletion docs/_docs/reference/other-new-features/open-classes.md
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Expand Up @@ -77,4 +77,4 @@ A class that is neither `abstract` nor `open` is similar to a `sealed` class: it

## Migration

`open` is a new modifier in Scala 3. To allow cross compilation between Scala 2.13 and Scala 3.0 without warnings, the feature warning for ad-hoc extensions is produced only under `-source future`. It will be produced by default from Scala 3.1 on.
`open` is a new modifier in Scala 3. To allow cross compilation between Scala 2.13 and Scala 3.0 without warnings, the feature warning for ad-hoc extensions is produced only under `-source future`. It will be produced by default [from Scala 3.4 on](https://github.com/lampepfl/dotty/issues/16334).
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