Adding to .clang-format command to insert newline EOF (#33201)

diff --git a/.clang-format b/.clang-format
index a1c292a..4fb9546 100644
--- a/.clang-format
+++ b/.clang-format
@@ -106,6 +106,7 @@
 Standard:        Cpp11
 TabWidth:        8
 UseTab:          Never
+InsertNewlineAtEOF: true
 ---
 Language: ObjC
 BasedOnStyle: WebKit