search between multiple indiices for team function (#3079)

### What problem does this PR solve?

#2834 
### Type of change

- [x] New Feature (non-breaking change which adds functionality)

deepdoc/parser/html_parser.py

@@ -16,11 +16,13 @@ import readability
 import html_text
 import chardet
 
+
 def get_encoding(file):
     with open(file,'rb') as f:
         tmp = chardet.detect(f.read())
         return tmp['encoding']
 
+
 class RAGFlowHtmlParser:
     def __call__(self, fnm, binary=None):
         txt = ""