clang-format the files

strdup_compat.h

@@ -7,10 +7,10 @@
  */
 
 #if !defined(HAVE_STRDUP) && defined(_MSC_VER)
-  /* MSC has the version as _strdup */
-# define strdup _strdup
+/* MSC has the version as _strdup */
+#define strdup _strdup
 #elif !defined(HAVE_STRDUP)
-# error You do not have strdup on your system.
+#error You do not have strdup on your system.
 #endif /* HAVE_STRDUP */
 
 #endif