修复分割函数中使用的变量错误 (#1443)

* Fix force_breakdown function parameter name

* Add handling for PDFs with lowercase starting paragraphs

* Change first lowercase word in meta_txt to uppercase

crazy_functions/pdf_fns/breakdown_txt.py

@@ -65,10 +65,10 @@ def cut(limit, get_token_fn, txt_tocut, must_break_at_empty_line, break_anyway=F
                 # 如果没有找到合适的切分点
                 if break_anyway:
                     # 是否允许暴力切分
-                    prev, post = force_breakdown(txt_tocut, limit, get_token_fn)
+                    prev, post = force_breakdown(remain_txt_to_cut, limit, get_token_fn)
                 else:
                     # 不允许直接报错
-                    raise RuntimeError(f"存在一行极长的文本！{txt_tocut}")
+                    raise RuntimeError(f"存在一行极长的文本！{remain_txt_to_cut}")
 
             # 追加列表
             res.append(prev); fin_len+=len(prev)