clang-format: copy latest and re-format

clang-format-16 has some backwards incompatible changes that require
additional settings for best compatibility and re-running the formatter.
Copy the latest .clang-format from the docs repository and reformat the
repository.

Change-Id: I6bbb587615b9d6f158900201ca04a647cb3a8f96
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/test/cancel.cpp b/test/cancel.cpp
index 3efefb8..f1f9588 100644
--- a/test/cancel.cpp
+++ b/test/cancel.cpp
@@ -1,6 +1,7 @@
-#include <functional>
 #include <stdplus/cancel.hpp>
 
+#include <functional>
+
 #include <gtest/gtest.h>
 
 namespace stdplus