diff --git a/otc_doc_convertor/convertor.py b/otc_doc_convertor/convertor.py
index c2775c11c..0aa28525d 100644
--- a/otc_doc_convertor/convertor.py
+++ b/otc_doc_convertor/convertor.py
@@ -31,8 +31,8 @@ class OTCDocConvertor:
         new_name = new_name.replace("(", "")
         new_name = new_name.replace(")", "")
         new_name = new_name.replace("#", "sharp")
-        new_name = new_name.replace('_&_','_and_')
-        new_name = re.sub(r'(\w+)&(\w+)',r'\1_and_\2',new_name)
+        new_name = new_name.replace('_&_', '_and_')
+        new_name = re.sub(r'(\w+)&(\w+)', r'\1_and_\2', new_name)
         new_name = new_name.lower()
         return new_name