Added CR to the test string

string_sender.vhd

@@ -45,7 +45,7 @@ architecture string_sender_rtl of string_sender is
 
 begin
   string_sender_main_proc: process(i_clk)
-    constant c_msg : string(1 to 13) := "Hello World!" & LF;
+    constant c_msg : string(1 to 14) := "Hello World!" & LF & CR;
     variable v_ind : integer range 0 to c_msg'length := 1;
     variable v_old_clk : std_logic := '1';
     variable z_sender : z_sender_t := idle;