Set clang-format macro indent.

1) Set clang-format macro indent.
2) Run clang-format on every files.

src/ftxui/screen/wcwidth.cpp

@@ -59,9 +59,10 @@
  * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
  */
 
-#include "ftxui/screen/string.hpp"
 #include <wchar.h>
 
+#include "ftxui/screen/string.hpp"
+
 namespace {
 struct interval {
   int first;