Clang-format sees the text behind `#pragma region` as code and formats it. Instead of stating the copyright and date there, it's now in the comment block right below it. The text "Copyright" is left in the `#pragma region` line, as clang-format sees it as a single identifier.
I took the opportunity to normalize the dates, and add the copyright notice to the source files where it was missing them (except for third-party and the generated resources.h file).
This fix is a workaround to what I believe is a bug in MSVC's optimised code generator. Somehow the casting of a wchar_t to a sint32 is causing some strange behaviour where the number 147 gets changed to 0x??93. Adding a printf to display codepoint was enough to alter the behaviour, making it very difficult to understand what was going on.