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

src/dateparser.h

 // Copyright 2008 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 12 matching lines @@
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #ifndef V8_DATEPARSER_H_
 #define V8_DATEPARSER_H_
 
 #include "scanner.h"
 
-namespace v8 { namespace internal {
+namespace v8 {
+namespace internal {
 
 class DateParser : public AllStatic {
  public:
 
   // Parse the string as a date. If parsing succeeds, return true after
   // filling out the output array as follows (all integers are Smis):
   // [0]: year
   // [1]: month (0 = Jan, 1 = Feb, ...)
   // [2]: day
   // [3]: hour
@@ skipping 186 matching lines @@
     int comp_[kSize];
     int index_;
     int named_month_;
   };
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_DATEPARSER_H_