wip

Author: SethTisue

2.13.16.md

@@ -4,16 +4,36 @@ The Scala team at Lightbend is pleased to announce Scala 2.13.16.
 
 The following changes are highlights of this release:
 
-### Breaking changes
+### Breaking change
+
+This is a bugfix, but we're calling special attention to it since it seems especially plausible that existing code might (perhaps inadvertently) be relying on the old behavior:
+
+* On the empty string, `.tail` and `.init` now throw (instead of returning the empty string) ([#10851](https://github.com/scala/scala/pull/10851) by [@sh0hei](https://github.com/sh0hei))
 
 ### Compatibility
 
-### Features
+* Support Scala 3.6 in TASTy reader ([#10893](https://github.com/scala/scala/pull/10893))
+* Support JDK 24 in optimizer (via ASM upgrade) ([#10888](https://github.com/scala/scala/pull/10888) by [@Philippus](https://github.com/Philippus))
+
+### REPL
+
+* REPL: JLine 3.27.1 (was .0) ([#10899](https://github.com/scala/scala/pull/10899))
+* REPL: JLine: stop using deprecated JNA ([#10898](https://github.com/scala/scala/pull/10898))
+* REPL: JLine 3.27.0 (was 3.26.3) ([#10882](https://github.com/scala/scala/pull/10882))
 
 ### Align with Scala 3
 
+* Under `-Xsource:3`, deprecate infix named args ([#10857](https://github.com/scala/scala/pull/10857) by [@som-snytt](https://github.com/som-snytt))
+
 ### Errors and warnings
 
+* Fix 2.13.15-only false positives with `-Wunused:patvars` ([#10870](https://github.com/scala/scala/pull/10870) by [@som-snytt](https://github.com/som-snytt))
+
+### Collections
+
+* Do not use `rangeHash` when `rangeDiff` is 0 ([#10912](https://github.com/scala/scala/pull/10912) by [@Friendseeker](https://github.com/Friendseeker))
+* Deprecate mutable.AnyRefMap ([#10862](https://github.com/scala/scala/pull/10862) by [@wangyum](https://github.com/wangyum))
+
 ### More changes
 
 For the complete 2.13.16 change lists, see [all merged PRs](https://github.com/scala/scala/pulls?q=is%3Amerged%20milestone%3A2.13.16) and [all closed bugs](https://github.com/scala/bug/issues?utf8=%E2%9C%93&q=is%3Aclosed+milestone%3A2.13.16).