improve readability

Author: dkarrasch

src/blockmap.jl

@@ -85,7 +85,7 @@ function Base.hcat(As::Union{LinearMap, UniformScaling, AbstractVecOrMat}...)
     nbc = length(As)
 
     # find first non-UniformScaling to detect number of rows
-    j = findfirst(x -> !isa(x, UniformScaling), As)
+    j = findfirst(A -> !isa(A, UniformScaling), As)
     # this should not happen, function should only be called with at least one LinearMap
     @assert !isnothing(j)
     @inbounds nrows = size(As[j], 1)
@@ -123,7 +123,7 @@ function Base.vcat(As::Union{LinearMap,UniformScaling,AbstractVecOrMat}...)
     nbr = length(As)
 
     # find first non-UniformScaling to detect number of rows
-    j = findfirst(x -> !isa(x, UniformScaling), As)
+    j = findfirst(A -> !isa(A, UniformScaling), As)
     # this should not happen, function should only be called with at least one LinearMap
     @assert !isnothing(j)
     @inbounds ncols = size(As[j], 2)