Revert "publisher: Get the collector in line with the io.Writer interface"

This reverts commit a9bcd38181.

publisher/htmlElementsCollector.go

@@ -152,21 +152,18 @@ type htmlElementsCollectorWriter struct {
 }
 
 // Write collects HTML elements from p.
-func (w *htmlElementsCollectorWriter) Write(p []byte) (int, error) {
+func (w *htmlElementsCollectorWriter) Write(p []byte) (n int, err error) {
+	n = len(p)
 	w.input = p
+	w.pos = 0
 
 	for {
 		w.r = w.next()
 		if w.r == eof {
-			break
+			return
 		}
 		w.state = w.state(w)
 	}
-
-	w.pos = 0
-	w.input = nil
-
-	return len(p), nil
 }
 
 func (l *htmlElementsCollectorWriter) backup() {