Ensure training new line in cocci files

.editorconfig

@@ -63,3 +63,6 @@ tab_width = 4
 
 [{*.bat,*.rc}]
 end_of_line = crlf
+
+[*.cocci]'
+insert_final_newline = true

build-scripts/SDL_migration.cocci

@@ -1746,4 +1746,4 @@ SDL_CreateRenderer(e1,
 @@
 - SDL_GetRectDisplayIndex
 + SDL_GetDisplayIndexForRect
-  (...)
+  (...)