Fix CS

Usually space follows the `if` preprocessor directive, however compilers
nowadays seem to pass this anomaly.

Author: petk

cmake/ext/standard/CMakeLists.txt

@@ -289,7 +289,7 @@ cmake_push_check_state(RESET)
   check_source_compiles(C [[
     #include <arm_acle.h>
     # if defined(__GNUC__)
-    #  if!defined(__clang__)
+    #  if !defined(__clang__)
     #   pragma GCC push_options
     #   pragma GCC target ("+nothing+crc")
     #  elif defined(__APPLE__)