Fix docstring

Author: darsnack

src/utils.jl

@@ -34,8 +34,7 @@ ofeltype(x, y) = convert(float(eltype(x)), y)
 epseltype(x) = eps(float(eltype(x)))
 
 """
-    rng_from_array()
-    rng_from_array(x)
+    rng_from_array([x])
 
 Create an instance of the RNG most appropriate for `x`.
 The current defaults are:
@@ -45,13 +44,13 @@ The current defaults are:
 - `x isa CuArray`: `CUDA.default_rng()`
 When `x` is unspecified, it is assumed to be a `AbstractArray`.
 """
+rng_from_array(::AbstractArray) = rng_from_array()
+rng_from_array(::CuArray) = CUDA.default_rng()
 if VERSION >= v"1.7"
   rng_from_array() = Random.default_rng()
 else
   rng_from_array() = Random.GLOBAL_RNG
 end
-rng_from_array(::AbstractArray) = rng_from_array()
-rng_from_array(::CuArray) = CUDA.default_rng()
 
 """
     glorot_uniform([rng=GLOBAL_RNG], dims...)