VM: Re-format to use at most one newline between functions

runtime/platform/text_buffer.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef RUNTIME_PLATFORM_TEXT_BUFFER_H_
 #define RUNTIME_PLATFORM_TEXT_BUFFER_H_
 
 #include "vm/allocation.h"
 #include "vm/globals.h"
 
 namespace dart {
 
-
 // TextBuffer maintains a dynamic character buffer with a printf-style way to
 // append text.
 class TextBuffer : ValueObject {
  public:
   explicit TextBuffer(intptr_t buf_size);
   ~TextBuffer();
 
   intptr_t Printf(const char* format, ...) PRINTF_ATTRIBUTE(2, 3);
   void AddChar(char ch);
   void EscapeAndAddUTF16CodeUnit(uint16_t cu);
@@ skipping 14 matching lines @@
  private:
   void EnsureCapacity(intptr_t len);
   char* buf_;
   intptr_t buf_size_;
   intptr_t msg_len_;
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_PLATFORM_TEXT_BUFFER_H_