fixed white lines

src/tracker/array.jl

@@ -87,11 +87,14 @@ Base.adjoint(xs::TrackedArray) = track(adjoint, xs)
 
 @grad transpose(xs) = transpose(data(xs)), Δ -> (reshape(transpose(Δ), size(xs)),)
 @grad adjoint(xs) = data(xs)', Δ -> (reshape(Δ', size(xs)),)
+
 Base.repeat(xs::TrackedArray; kw...) = track(repeat, xs; kw...)
+
 @grad function repeat(xs; inner=ntuple(x->1, ndims(xs)), outer=ntuple(x->1, ndims(xs)))
   repeat(data(xs), inner = inner, outer = outer), function (Δ)
     Δ′ = zero(xs)
     S = size(xs)
+
     # Loop through each element of Δ, calculate source dimensions, accumulate into Δ′
     for (dest_idx, val) in pairs(IndexCartesian(), data(Δ))
         # First, round dest_idx[dim] to nearest gridpoint defined by inner[dim], then
@@ -102,6 +105,7 @@ Base.repeat(xs::TrackedArray; kw...) = track(repeat, xs; kw...)
     (nobacksies(:repeat, Δ′),)
   end
 end
+
 for f in [:vcat, :hcat]
   UArray = :(Union{TrackedArray,Vector,Matrix,Adjoint,Transpose})
   @eval begin