Refactor parser code (#9042)

### What problem does this PR solve?

Refactor code

### Type of change

- [x] Refactoring

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

deepdoc/parser/docx_parser.py

     def __compose_table_content(self, df):
 
         def blockType(b):
-            patt = [
+            pattern = [
                 ("^(20|19)[0-9]{2}[年/-][0-9]{1,2}[月/-][0-9]{1,2}日*$", "Dt"),
                 (r"^(20|19)[0-9]{2}年$", "Dt"),
                 (r"^(20|19)[0-9]{2}[年/-][0-9]{1,2}月*$", "Dt"),
                 (r"^[0-9.,+-]+[0-9A-Za-z/$￥%<>（）()' -]+$", "NE"),
                 (r"^.{1}$", "Sg")
             ]
-            for p, n in patt:
+            for p, n in pattern:
                 if re.search(p, b):
                     return n
             tks = [t for t in rag_tokenizer.tokenize(b).split() if len(t) > 1]

deepdoc/parser/excel_parser.py

         file_like_object.seek(0)
 
         if not (file_head.startswith(b'PK\x03\x04') or file_head.startswith(b'\xD0\xCF\x11\xE0')):
-            logging.info("****wxy: Not an Excel file, converting CSV to Excel Workbook")
+            logging.info("Not an Excel file, converting CSV to Excel Workbook")
 
             try:
                 file_like_object.seek(0)
                 return RAGFlowExcelParser._dataframe_to_workbook(df)
 
             except Exception as e_csv:
-                raise Exception(f"****wxy: Failed to parse CSV and convert to Excel Workbook: {e_csv}")
+                raise Exception(f"Failed to parse CSV and convert to Excel Workbook: {e_csv}")
 
         try:
             return load_workbook(file_like_object,data_only= True)
         except Exception as e:
-            logging.info(f"****wxy: openpyxl load error: {e}, try pandas instead")
+            logging.info(f"openpyxl load error: {e}, try pandas instead")
             try:
                 file_like_object.seek(0)
                 df = pd.read_excel(file_like_object)
                 return RAGFlowExcelParser._dataframe_to_workbook(df)
             except Exception as e_pandas:
-                raise Exception(f"****wxy: pandas.read_excel error: {e_pandas}, original openpyxl error: {e}")
+                raise Exception(f"pandas.read_excel error: {e_pandas}, original openpyxl error: {e}")
 
     @staticmethod
     def _dataframe_to_workbook(df):

deepdoc/parser/html_parser.py

     @classmethod
     def parser_txt(cls, txt):
         if not isinstance(txt, str):
-            raise TypeError("txt type should be str!")
+            raise TypeError("txt type should be string!")
         html_doc = readability.Document(txt)
         title = html_doc.title()
         content = html_text.extract_text(html_doc.summary(html_partial=True))