add NEWS for mutable struct singletons change (#25854) #25862
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JeffBezanson
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NEWS.md
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| @@ -60,6 +60,10 @@ Language changes | |||
| * The syntax `1.+2` is deprecated, since it is ambiguous: it could mean either | |||
| `1 .+ 2` (the current meaning) or `1. + 2` ([#19089]). | |||
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| * Mutable structs with no fields are no longer singletons; it is now possible to make | |||
| multuple instances of them that can be distinguished by `===` ([#25854]). | |||
also a small doc clarification [ci skip]
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WenjieZ
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Remove the paragraphs saying "Immutable composite types with no fields are singletons". Previously, `MutableNoFields() === MutableNoFields()`, but this was changed in JuliaLang#25854. When that got changed, the existing docs was tweaked to say that the struct had to be immutable(JuliaLang#25862) . However, there is no longer anything specific about it having no fields. The docs about singletons can thus just be removed since they are not special anymore.
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[ci skip]