all: quieten vet's complaints about unkeyed composite literals
Created by: kortschak
Please take a look.
Two cases are left as is because the code is test code and is more readable without a key; it is a mat.Transpose
literal.
$ go vet -composites ./...
# gonum.org/v1/gonum/stat/spatial_test
stat/spatial/spatial_areal_example_test.go:34: gonum.org/v1/gonum/mat.Transpose composite literal uses unkeyed fields
# gonum.org/v1/gonum/stat_test
stat/cca_example_test.go:35: gonum.org/v1/gonum/mat.Transpose composite literal uses unkeyed fields