Method UniversalPrintArray

tests/gtest/gtest.h:8714–8733

// elements, starting at address 'begin'.
template <typename T>
void UniversalPrintArray(const T* begin, size_t len, ::std::ostream* os) {
  if (len == 0) {
    *os << "{}";
  } else {
    *os << "{ ";
    const size_t kThreshold = 18;
    const size_t kChunkSize = 8;
    // If the array has more than kThreshold elements, we'll have to
    // omit some details by printing only the first and the last
    // kChunkSize elements.
    if (len <= kThreshold) {
      PrintRawArrayTo(begin, len, os);
    } else {
      PrintRawArrayTo(begin, kChunkSize, os);
      *os << ", ..., ";
      PrintRawArrayTo(begin + len - kChunkSize, kChunkSize, os);
    }
    *os << " }";
  }
}
// This overload prints a (const) char array compactly.
GTEST_API_ void UniversalPrintArray(
    const char* begin, size_t len, ::std::ostream* os);