text/template/parse: fix comment

R=r, rsc
CC=golang-dev
https://golang.org/cl/5644055

src/pkg/text/template/parse/lex.go

@@ -187,7 +187,7 @@ func (l *lexer) lineNumber() int {
 }
 
 // error returns an error token and terminates the scan by passing
-// back a nil pointer that will be the next state, terminating l.run.
+// back a nil pointer that will be the next state, terminating l.nextItem.
 func (l *lexer) errorf(format string, args ...interface{}) stateFn {
 	l.items <- item{itemError, fmt.Sprintf(format, args...)}
 	return nil