Strange:
julia> using Printf
julia> x=[1.1231233, 2.324234234]
2-element Vector{Float64}:
1.1231233
2.324234234
julia> fmt="%.2f"
"%.2f"
julia> format.(Ref(stdout), Ref(fmt), x)
ERROR: UndefVarError: format not defined
Stacktrace:
[1] top-level scope
@ REPL[5]:1
perhaps a version thing? I am still on Julia 1.6.1.