fix inclusion of fmt

include/spdlog/fmt/fmt.h

@@ -22,6 +22,6 @@
 #include "bundled/core.h"
 #include "bundled/format.h"
 #else // SPDLOG_FMT_EXTERNAL is defined - use external fmtlib
-#include <fmt/core.h>
-#include <fmt/format.h>
+#include "fmt/core.h"
+#include "fmt/format.h"
 #endif

include/spdlog/impl/fmt-format.cpp

@@ -5,7 +5,11 @@
 //
 // For the license information refer to format.h.
 
+#if !defined(SPDLOG_FMT_EXTERNAL)
+#include "spdlog/fmt/bundled/format-inl.h"
+#else
 #include "fmt/format-inl.h"
+#endif
 
 FMT_BEGIN_NAMESPACE
         template struct internal::basic_data<void>;