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repr: update docstring for possible values of the context argument #39795

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Jun 8, 2021
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repr: update docstring for possible values of the context argument #39795

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8 changes: 6 additions & 2 deletions base/strings/io.jl
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Expand Up @@ -199,14 +199,18 @@ print(io::IO, s::Union{String,SubString{String}}) = (write(io, s); nothing)
Create a string from any value using the [`show`](@ref) function.
You should not add methods to `repr`; define a `show` method instead.

The optional keyword argument `context` can be set to an `IO` or [`IOContext`](@ref)
object whose attributes are used for the I/O stream passed to `show`.
The optional keyword argument `context` can be set to a `:key=>value` pair, a
tuple of `:key=>value` pairs, or an `IO` or [`IOContext`](@ref) object whose
attributes are used for the I/O stream passed to `show`.

Note that `repr(x)` is usually similar to how the value of `x` would
be entered in Julia. See also [`repr(MIME("text/plain"), x)`](@ref) to instead
return a "pretty-printed" version of `x` designed more for human consumption,
equivalent to the REPL display of `x`.

!!! compat "Julia 1.7"
Passing a tuple to keyword `context` requires Julia 1.7 or later.

# Examples
```jldoctest
julia> repr(1)
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