Allow arguments before and after block-formatted functions.

test/regression/0000/0050.stmt

 >>> (indent 2)
   inputStream
     .transform(UTF8.decoder)
     .transform(new LineSplitter())
     .listen(
       (String line) {
         print('Got ${line.length} characters from stream');
       },
       onDone: () { print('file is now closed'); },
       onError: (e) { print(e.toString()); });
 <<<
-  inputStream
-      .transform(UTF8.decoder)
-      .transform(new LineSplitter())
-      .listen((String line) {
+  inputStream.transform(UTF8.decoder).transform(new LineSplitter()).listen(
+      (String line) {
     print('Got ${line.length} characters from stream');
   }, onDone: () {
     print('file is now closed');
   }, onError: (e) {
     print(e.toString());
   });