Update app.py

app.py

@@ -105,7 +105,7 @@ def realesrgan(img, model_name, denoise_strength, face_enhance, outscale, ext):
             extension = 'jpg'
 
         #out_filename = f"output_{rnd_string(8)}.{extension}"
-        out_filename = f"output_" + rnd_string(8) + "." + ext
+        out_filename = f"output_{rnd_string(8)}." + ext
         cv2.imwrite(out_filename, output)
         global last_file
         last_file = out_filename