How to repeat the format in @printf?

General Usage
2

In Julia 1.6 you can use Printf.Format, and then Printf.format instead of the macro:

julia> f = Printf.Format("%9.3f "^4);

julia> Printf.format(f, 1,2,3,4)
"    1.000     2.000     3.000     4.000 "

julia> Printf.format(stdout, f, 1,2,3,4)
    1.000     2.000     3.000     4.000

(Well, there is an unwanted trailing space in this example, but this can be easily worked around with other ways of making the format string.)

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