File standardisation (#13131)

* Adds the check components

* Adds in trailing newlines

* Converts all CRLF to LF

* Post merge EOF

* Post merge line endings

* Final commit

code/modules/buildmode/bm_mode.dm

@@ -84,4 +84,4 @@
 			deselect_region()
 
 /datum/buildmode_mode/proc/handle_selected_region(mob/user, params)
-	return
+	return