some bullets (from the RC1 notes) were missing from the initially published 2.13 release notes. they are now included, as follows:
simple string matcher (s interpolator can also be used in pattern matches), added tapEach , added @unused , added converters between functions and extractors, PartialFunction overloads andThen , Cloneable/Serializable are just type aliases now, ControlThrowable never suppresses, deprecated universal Equiv , deprecated @usecase , Symbol literals deprecated, Unicode arrows deprecated, postfixOps syntax disabled by default, value-discard warnings can be suppressed via type ascription to Unit
see the notes themselves for links to details