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compat notice for a[begin] indexing #55197

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Jul 21, 2024
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compat notice for a[begin] indexing #55197

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6 changes: 5 additions & 1 deletion base/docs/basedocs.jl
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Expand Up @@ -1386,7 +1386,11 @@ Usually `begin` will not be necessary, since keywords such as [`function`](@ref)
implicitly begin blocks of code. See also [`;`](@ref).

`begin` may also be used when indexing to represent the first index of a
collection or the first index of a dimension of an array.
collection or the first index of a dimension of an array. For example,
`a[begin]` is the first element of an array `a`.

!!! compat "Julia 1.6"
Use of `begin` as an index requires Julia 1.6 or later.

# Examples
```jldoctest
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