update app

app.py

@@ -143,7 +143,7 @@ with gr.Blocks() as demo:
             gen_next_move_button = gr.Button("Submit")
 
             def gen_next_move(pgn, new_move, move_ctr, c):
-                pgn += new_move.strip() + ' '
+                pgn += (' ' if c == 'black' else '') + new_move.strip() + ' '
                 if c == 'black':
                     move_ctr += 1
                     pgn = f'{pgn.rstrip()} {move_ctr}. '