The tree view of the project layout seemed to show that "github.com",
"cmd", and "pkg" were all in the same directory. The usage later in the
document (and normal go layout) would have them as subdirectories.
The new tree output was generated with the below:
(cd `mktemp -d`
mkdir -p github.com/me/foo/{cmd/foo,pkg/baz}
touch github.com/me/foo/{cmd/foo/main,pkg/baz/bar{_test,}}.go
tree -n --noreport github.com/me/foo
)
