Julia 0.7 pemanently call to use modules

Julia 0.7 pemanently call to use modules

julia> string(Date(now()))
WARNING: Base.now is deprecated: it has been moved to the standard library package `Dates`.
Add `using Dates` to your imports.
 in module Main
"2018-08-13"

julia> using Dates

julia> string(Date(now()))
WARNING: Base.now is deprecated: it has been moved to the standard library package `Dates`.
Add `using Dates` to your imports.
 in module Main
"2018-08-13"

After reopennig Julia

julia> using Dates

julia> string(Date(now()))
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