minor docs polish

Author: dkarrasch

docs/src/types.md

@@ -92,8 +92,8 @@ SparseArrays.blockdiag
 Base.:*(::LinearMap,::AbstractVector)
 Base.:*(::LinearMap,::AbstractMatrix)
 Base.:*(::AbstractMatrix,::LinearMap)
+LinearAlgebra.mul!(::AbstractVecOrMat,::LinearMap,::AbstractVector)
 LinearAlgebra.mul!(::AbstractMatrix,::LinearMap,::AbstractMatrix)
-LinearAlgebra.mul!(::AbstractVecOrMat,::LinearMap,::AbstractVector,::Number,::Number)
 *(::LinearAlgebra.AdjointAbsVec,::LinearMap)
 *(::LinearAlgebra.TransposeAbsVec,::LinearMap)
 ```

src/blockmap.jl

@@ -460,25 +460,23 @@ for k in 1:8 # is 8 sufficient?
     end
 end
 
-import SparseArrays: blockdiag
 """
     blockdiag(As::Union{LinearMap,AbstractMatrix}...)::BlockDiagonalMap
 
 Construct a (lazy) representation of the diagonal concatenation of the arguments.
 To avoid fallback to the generic `SparseArrays.blockdiag`, there must be a `LinearMap`
 object among the first 8 arguments.    
 """
-function blockdiag end
+SparseArrays.blockdiag
 
-import Base: cat
 """
     cat(As::Union{LinearMap,AbstractMatrix}...; dims=(1,2))::BlockDiagonalMap
 
 Construct a (lazy) representation of the diagonal concatenation of the arguments.
 To avoid fallback to the generic `Base.cat`, there must be a `LinearMap`
 object among the first 8 arguments.
 """
-function cat end
+Base.cat
 
 Base.size(A::BlockDiagonalMap) = (last(A.rowranges[end]), last(A.colranges[end]))