Use LazyString in depwarn

Project.toml

@@ -1,6 +1,6 @@
 name = "Flux"
 uuid = "587475ba-b771-5e3f-ad9e-33799f191a9c"
-version = "0.14.13"
+version = "0.14.14"
 
 [deps]
 Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"

src/deprecations.jl

@@ -196,8 +196,8 @@ end
 # Greek-letter keywords deprecated in Flux 0.13
 # Arguments (old => new, :function, "β" => "beta")
 function _greek_ascii_depwarn(βbeta::Pair, func = :loss, names = "" => "")
-  Base.depwarn("""function $func no longer accepts greek-letter keyword $(names.first)
-    please use ascii $(names.second) instead""", func)
+  Base.depwarn(LazyString("function $func no longer accepts greek-letter keyword ", names.first, """
+    please use ascii """, names.second, " instead"), func)
   βbeta.first
 end
 _greek_ascii_depwarn(βbeta::Pair{Nothing}, _...) = βbeta.second

src/layers/macro.jl

@@ -89,7 +89,7 @@ end
 
 function _check_new_macro(x::T) where T
   Functors.isleaf(x) && return
-  Base.depwarn("This type should probably now use `Flux.@layer` instead of `@functor`: $T", Symbol("@functor"))
+  Base.depwarn(LazyString("This type should probably now use `Flux.@layer` instead of `@functor`: ", T), Symbol("@functor"))
 end
 _check_new_macro(::Tuple) = nothing  # defined by Functors.jl, not by users
 _check_new_macro(::NamedTuple) = nothing