add comment space directive (#1558)

.clang-format

diff --git a/.clang-format b/.clang-format
index 2a80669..b7cf997 100644
--- a/.clang-format
+++ b/.clang-format
@@ -1,4 +1,4 @@
 BasedOnStyle:  LLVM
 DerivePointerAlignment: false
 PointerAlignment: Left
-
+SpacesBeforeTrailingComments: 1