Minor cleanups in cli/command/container

This change does some minor cleanups in the
cli/command/container package;

- sort imports
- replace `fmt.Fprintf()` with `fmt.Fprintln()` if no formatting is used
- replace `fmt.Errorf()` with `errors.New()` if no formatting is used
- remove some redundant `else`'s

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

command/container/top.go

@@ -5,11 +5,10 @@ import (
 	"strings"
 	"text/tabwriter"
 
-	"golang.org/x/net/context"
-
 	"github.com/docker/docker/cli"
 	"github.com/docker/docker/cli/command"
 	"github.com/spf13/cobra"
+	"golang.org/x/net/context"
 )
 
 type topOptions struct {