For MSVC, gmock_output_test.py output struct std::pair<int,bool>, for GCC, it's output
std::pair<int, bool>, it's not the same, my intention is getting these to be same by removing
struct for MSVC's outptu, and strip redundant space for GCC.
As a by-product,
```
#ifdef _MSC_VER
#define ERROR_DESC "class std::runtime_error"
#else
#define ERROR_DESC "std::runtime_error"
#endif
```
can be simplified to
```
#define ERROR_DESC "std::runtime_error"
```
Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
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