[fix] FLAKE8

Author: tswsxk

EduNLP/SIF/segment/segment.py

@@ -84,10 +84,10 @@ def __init__(self, item, figures: dict = None):
         self._ques_mark_segments = []
         self._tag_segments = []
         self._sep_segments = []
-        
+
         # remove $\textf{*} from the item$
         item_no_textf = "".join(re.split(r"\$\\textf\{([^,]+?),b?d?i?t?u?w?}\$", item))
-        
+
         segments = re.split(r"(\$.+?\$)", item_no_textf)
         for segment in segments:
             if not segment: