Clean up Assembly files (#1003)

a/Assembler FASM DOS.asm

@@ -4,13 +4,13 @@ entry .code: start
 
 segment .code
 start:
-	mov ax, .data ; put data segment into ax
-	mov ds, ax    ; there, I setup the DS for you
-	mov dx, msg   ; now I give you the offset in DX. DS:DX now completed.
+	mov ax, .data
+	mov ds, ax
+	mov dx, msg 
 	mov ah, 9h
 	int 21h
 	mov ah, 4ch
 	int 21h
 
 segment .data
-	msg db 'Hello World', '$'
+	msg db 'Hello World', '$'