fix text out of bounds

app.py

@@ -146,7 +146,7 @@ def generate_image(bac_img, title,a,b,c,d,e,f,   #-- 当前文本行内字数可
             continue
         sub_title = lines[0]
         sub_texts = "。".join(lines[1:])
-        words = int((width - txt_x) / sz3) + 2
+        words = int((width - txt_x) / sz3) - 2
         sub_text = textwrap.wrap(sub_texts, width=words)
         # sub_text = [i.center(words) for i in sub_text]
         # -----文本框效果--------