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update hash doc string: widen not required any more #55867

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update hash doc string: widen not required any more #55867

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4 changes: 1 addition & 3 deletions base/hashing.jl
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Expand Up @@ -11,9 +11,7 @@ optional second argument `h` is another hash code to be mixed with the result.
New types should implement the 2-argument form, typically by calling the 2-argument `hash`
method recursively in order to mix hashes of the contents with each other (and with `h`).
Typically, any type that implements `hash` should also implement its own [`==`](@ref) (hence
[`isequal`](@ref)) to guarantee the property mentioned above. Types supporting subtraction
(operator `-`) should also implement [`widen`](@ref), which is required to hash
values inside heterogeneous arrays.
[`isequal`](@ref)) to guarantee the property mentioned above.

The hash value may change when a new Julia process is started.

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