Fix docs and improve coverage

Author: odow

docs/src/reference/containers.md

@@ -8,7 +8,7 @@ Containers.DenseAxisArray
 Containers.SparseAxisArray
 Containers.container
 Containers.rowtable
-Conntainers.AutoContainerType
+Containers.AutoContainerType
 Containers.default_container
 Containers.@container
 Containers.VectorizedProductIterator

src/Containers/SparseAxisArray.jl

@@ -100,6 +100,9 @@ function Base.setindex!(
 end
 
 function _kwargs_to_args(d::SparseAxisArray{T,N}; kwargs...) where {T,N}
+    if length(kwargs) != N
+        throw(BoundsError(d, kwargs))
+    end
     return ntuple(N) do i
         kw = keys(kwargs)[i]
         if d.names[i] != kw

test/Containers/test_SparseAxisArray.jl

@@ -286,6 +286,8 @@ function test_containers_sparseaxisarray_kwarg_indexing()
         ),
         y[i = 2, 2],
     )
+    @test_throws(BoundsError, y[i = 2] = 1)
+    @test_throws(BoundsError, y[2] = 1)
     return
 end