Keep two empty lines between declarations for cpp files

src/strtod.cc

 // Copyright 2012 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 110 matching lines @@
   // The input buffer has been trimmed. Therefore the last digit must be
   // different from '0'.
   ASSERT(buffer[buffer.length() - 1] != '0');
   // Set the last digit to be non-zero. This is sufficient to guarantee
   // correct rounding.
   significant_buffer[kMaxSignificantDecimalDigits - 1] = '1';
   *significant_exponent =
       exponent + (buffer.length() - kMaxSignificantDecimalDigits);
 }
 
+
 // Reads digits from the buffer and converts them to a uint64.
 // Reads in as many digits as fit into a uint64.
 // When the string starts with "1844674407370955161" no further digit is read.
 // Since 2^64 = 18446744073709551616 it would still be possible read another
 // digit if it was less or equal than 6, but this would complicate the code.
 static uint64_t ReadUint64(Vector<const char> buffer,
                            int* number_of_read_digits) {
   uint64_t result = 0;
   int i = 0;
   while (i < buffer.length() && result <= (kMaxUint64 / 10 - 1)) {
@@ skipping 292 matching lines @@
 
   double guess;
   if (DoubleStrtod(trimmed, exponent, &guess) ||
       DiyFpStrtod(trimmed, exponent, &guess)) {
     return guess;
   }
   return BignumStrtod(trimmed, exponent, guess);
 }
 
 } }  // namespace v8::internal