add a d to keyword

src/rules.jl

@@ -84,7 +84,7 @@ function apply!(o::Nesterov, state, x, dx)
 end
 
 """
-    RMSProp(η = 1f-3, ρ = 9f-1, ϵ = eps(typeof(η)); centre = false)
+    RMSProp(η = 1f-3, ρ = 9f-1, ϵ = eps(typeof(η)); centred = false)
 
 Optimizer using the
 [RMSProp](https://www.cs.toronto.edu/~tijmen/csc321/slides/lecture_slides_lec6.pdf)
@@ -101,26 +101,26 @@ gradients by an estimate their variance, instead of their second moment.
                   prominent direction, in effect dampening oscillations.
 - Machine epsilon (`ϵ`): Constant to prevent division by zero
                          (no need to change default)
-- Keyword `centre` (or `center`): Indicates whether to use centred variant
-                                  of the algorithm.
+- Keyword `centred` (or `centered`): Indicates whether to use centred variant
+                                     of the algorithm.
 """
 struct RMSProp{T}
   eta::T
   rho::T
   epsilon::T
-  centre::Bool
+  centred::Bool
 end
-RMSProp(η = 1f-3, ρ = 9f-1, ϵ = eps(typeof(η)); centre = false, center = false) =
-  RMSProp{typeof(η)}(η, ρ, ϵ, centre | center)
+RMSProp(η = 1f-3, ρ = 9f-1, ϵ = eps(typeof(η)); centred::Bool = false, centered::Bool = false) =
+  RMSProp{typeof(η)}(η, ρ, ϵ, centred | centered)
 
-init(o::RMSProp, x::AbstractArray) = (zero(x), o.centre ? zero(x) : false)
+init(o::RMSProp, x::AbstractArray) = (zero(x), o.centred ? zero(x) : false)
 
 function apply!(o::RMSProp, state, x, dx)
   η, ρ, ϵ = o.eta, o.rho, o.epsilon
   quad, lin = state
 
   @.. quad = ρ * quad + (1 - ρ) * abs2(dx)
-  if o.centre
+  if o.centred
     @.. lin = ρ * lin + (1 - ρ) * dx
   end
   dx′ = @lazy dx * η / (sqrt(quad - abs2(lin)) + ϵ)
@@ -132,7 +132,7 @@ function Base.show(io::IO, o::RMSProp)
     show(io, typeof(o))
     print(io, "(")
     join(io, [o.eta, o.rho, o.epsilon], ", ")
-    print(io, "; centre = ", o.centre, ")")
+    print(io, "; centred = ", o.centred, ")")
 end
 
 """

test/rules.jl

@@ -22,7 +22,7 @@ RULES = [
 
 name(o) = typeof(o).name.name  # just for printing testset headings
 name(o::OptimiserChain) = join(name.(o.opts), " → ")
-name(o::RMSProp) = o.centre ? "RMSProp(centre = true)" : :RMSProp
+name(o::RMSProp) = o.centred ? "RMSProp(centred = true)" : "RMSProp"
 
 LOG = Dict()  # for debugging these testsets, this makes it easy to plot each optimiser's loss