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

test/cctest/test-version.cc

 // Copyright 2009 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 15 matching lines @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "v8.h"
 
 #include "version.h"
 #include "cctest.h"
 
 using namespace v8::internal;
 
 
-namespace v8 { namespace internal {
+namespace v8 {
+namespace internal {
 
 void SetVersion(int major, int minor, int build, int patch,
                 bool candidate, const char* soname) {
   Version::major_ = major;
   Version::minor_ = minor;
   Version::build_ = build;
   Version::patch_ = patch;
   Version::candidate_ = candidate;
   Version::soname_ = soname;
 }
@@ skipping 32 matching lines @@
   CheckVersion(1, 0, 0, 0, false, "1.0.0", "libv8-1.0.0.so");
   CheckVersion(1, 0, 0, 0, true,
                "1.0.0 (candidate)", "libv8-1.0.0-candidate.so");
   CheckVersion(1, 0, 0, 1, false, "1.0.0.1", "libv8-1.0.0.1.so");
   CheckVersion(1, 0, 0, 1, true,
                "1.0.0.1 (candidate)", "libv8-1.0.0.1-candidate.so");
   CheckVersion(2, 5, 10, 7, false, "2.5.10.7", "libv8-2.5.10.7.so");
   CheckVersion(2, 5, 10, 7, true,
                "2.5.10.7 (candidate)", "libv8-2.5.10.7-candidate.so");
 }