Add documentation for a few more types

ansi/stylewriter.go

@@ -5,12 +5,14 @@ import (
 	"io"
 )
 
+// StyleWriter is a Writer that applies styling on whatever you write to it.
 type StyleWriter struct {
 	w     io.Writer
 	buf   bytes.Buffer
 	rules StylePrimitive
 }
 
+// NewStyleWriter returns a new StyleWriter.
 func NewStyleWriter(ctx RenderContext, w io.Writer, rules StylePrimitive) *StyleWriter {
 	return &StyleWriter{
 		w:     w,
@@ -22,6 +24,7 @@ func (w *StyleWriter) Write(b []byte) (int, error) {
 	return w.buf.Write(b)
 }
 
+// Close must be called when you're finished writing to a StyleWriter.
 func (w *StyleWriter) Close() error {
 	renderText(w.w, w.rules, w.buf.String())
 	return nil