Documented `const` fields of a `mutable struct` does not show up in documentation

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Hello, everyone. While I was adding some docstrings to a mutable struct, I’ve realized that when the field is set as constant, the documentation doesn’t work. Take, for example, the following mutable struct:

"Some random docs I write here."
mutable struct Foo{T<:AbstractFloat}
    "Mass"
    const m::T
    "Time"
    t::T
end

If I enter into help mode and type Foo, I get the corresponding docstring:

help?> Foo
search: Foo Bool

  Some random docs I write here.

The same happens with the field t:

help?> Foo.t
  Time

However, when I search for the constant field, nothing shows up. As if that field didn’t have docstrings:

Foo.m
  Foo has fields m, and t.

Is this a bug? I’ve read the corresponding section at the docs but nothing is mentioned. Writing @doc in front of the string does not work either.

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