Split nested namespaces declaration in two lines in accordance with C++ Style Guide.

src/assembler.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 25 matching lines @@
 
 #include "arguments.h"
 #include "execution.h"
 #include "ic-inl.h"
 #include "factory.h"
 #include "runtime.h"
 #include "serialize.h"
 #include "stub-cache.h"
 #include "regexp-stack.h"
 
-namespace v8 { namespace internal {
+namespace v8 {
+namespace internal {
 
 
 // -----------------------------------------------------------------------------
 // Implementation of Label
 
 int Label::pos() const {
   if (pos_ < 0) return -pos_ - 1;
   if (pos_ > 0) return  pos_ - 1;
   UNREACHABLE();
   return 0;
@@ skipping 561 matching lines @@
   return ExternalReference(FUNCTION_ADDR(Debug::Break));
 }
 
 
 ExternalReference ExternalReference::debug_step_in_fp_address() {
   return ExternalReference(Debug::step_in_fp_addr());
 }
 #endif
 
 } }  // namespace v8::internal