cli/command/formatter: minor cleanups

no need to initialize with an empty string

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

cli/command/formatter/formatter.go

@@ -82,6 +82,9 @@ func (c *Context) parseFormat() (*template.Template, error) {
 }
 
 func (c *Context) postFormat(tmpl *template.Template, subContext SubContext) {
+	if c.Output == nil {
+		c.Output = io.Discard
+	}
 	if c.Format.IsTable() {
 		t := tabwriter.NewWriter(c.Output, 10, 1, 3, ' ', 0)
 		buffer := bytes.NewBufferString("")
@@ -111,7 +114,7 @@ type SubFormat func(func(SubContext) error) error
 
 // Write the template to the buffer using this Context
 func (c *Context) Write(sub SubContext, f SubFormat) error {
-	c.buffer = bytes.NewBufferString("")
+	c.buffer = &bytes.Buffer{}
 	c.preFormat()
 
 	tmpl, err := c.parseFormat()