Fix IndentWriter indenting after trailing line-breaks

indent.go

@@ -3,37 +3,29 @@ package gold
 import (
 	"io"
 	"strings"
-	"sync"
 )
 
 type IndentWriter struct {
 	Indent  uint
 	Forward io.Writer
 
-	initialWrite sync.Once
+	skipIndent bool
 }
 
-// Write is used to write more content to the reflow buffer.
+// Write is used to write content to the indent buffer.
 func (w *IndentWriter) Write(b []byte) (int, error) {
-	w.initialWrite.Do(func() {
-		w.Forward.Write([]byte(strings.Repeat(" ", int(w.Indent))))
-	})
-
 	for _, c := range string(b) {
+		if !w.skipIndent {
+			w.Forward.Write([]byte(strings.Repeat(" ", int(w.Indent))))
+			w.skipIndent = true
+		}
+
 		w.Forward.Write([]byte{byte(c)})
 		if c == '\n' {
 			// end of current line
-			w.Forward.Write([]byte(strings.Repeat(" ", int(w.Indent))))
-		} else {
-			// any other character
+			w.skipIndent = false
 		}
 	}
 
 	return len(b), nil
 }
-
-// Close will finish the reflow operation. Always call it before trying to
-// retrieve the final result.
-func (w *IndentWriter) Close() error {
-	return nil
-}