Fix macro definition

Author: franzpoeschel

toml/toml_version.hpp

@@ -17,13 +17,11 @@
  * making it possible to link multiple packages that internally use toml11 in
  * different versions.
  */
+#define TOML11_GENERATE_INLINE_VERSION_NAMESPACE(major, minor, patch)          \
+    TOML11_CONCAT(toml11_, major, _, minor, _, patch)
+
 #define TOML11_INLINE_VERSION_NAMESPACE                                        \
-    TOML11_CONCAT(                                                             \
-        toml11_,                                                               \
-        TOML11_VERSION_MAJOR,                                                  \
-        _,                                                                     \
-        TOML11_VERSION_MINOR,                                                  \
-        _,                                                                     \
-        TOML11_VERSION_PATCH)
+    TOML11_GENERATE_INLINE_VERSION_NAMESPACE(                                  \
+        TOML11_VERSION_MAJOR, TOML11_VERSION_MINOR, TOML11_VERSION_PATCH)
 
 #endif // TOML11_TOML11_VERSION_HPP