Fix(tweakme): SPDLOG_FUNCTION

- Uncommenting SPDLOG_FUNCTION will make MSVC fail to compile:
    __PRETTY_FUNCTION__ is shown in intellisense but it's not available at compile time
    https://stackoverflow.com/questions/48857887/pretty-function-in-visual-c

include/spdlog/tweakme.h

@@ -127,5 +127,9 @@
 // __PRETTY_FUNCTION__ might be nicer in clang/gcc, and __FUNCTION__ in msvc.
 // Defaults to __FUNCTION__ (should work on all compilers) if not defined.
 //
-// #define SPDLOG_FUNCTION __PRETTY_FUNCTION__
+// #ifdef __PRETTY_FUNCTION__
+// # define SPDLOG_FUNCTION __PRETTY_FUN  CTION__
+// #else
+// # define SPDLOG_FUNCTION __FUNCTION__
+// #endif
 ///////////////////////////////////////////////////////////////////////////////