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

runtime/vm/instructions_x64_test.cc

 // 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.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/assembler.h"
 #include "vm/instructions.h"
 #include "vm/stub_code.h"
 #include "vm/unit_test.h"
 
 namespace dart {
 
 #define __ assembler->
 
 ASSEMBLER_TEST_GENERATE(Call, assembler) {
   __ Call(*StubCode::InvokeDartCode_entry());
   __ ret();
 }
 
-
 static intptr_t prologue_code_size = -1;
 
-
 ASSEMBLER_TEST_GENERATE(Jump, assembler) {
   ASSERT(assembler->CodeSize() == 0);
   __ pushq(PP);
   __ LoadPoolPointer();
   prologue_code_size = assembler->CodeSize();
   __ JmpPatchable(*StubCode::InvokeDartCode_entry(), PP);
   __ JmpPatchable(*StubCode::AllocateArray_entry(), PP);
   __ popq(PP);
   __ ret();
 }
 
-
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64