fix bs data \n

@@ -265,7 +265,7 @@ class BSWorkbook(Workbook):
             return
         date_col = date_col + 1
         for date_tuple_src in ws.iter_cols(min_col=date_col, max_col=date_col, min_row=min_row, values_only=True):
-            date_tuple = [date[:10] if isinstance(date, str) else date for date in date_tuple_src]
+            date_tuple = [date.replace('\n', '')[:10] if isinstance(date, str) else date for date in date_tuple_src]
             dt_array, _ = tslib.array_to_datetime(
                 np.array(date_tuple, copy=False, dtype=np.object_),
                 errors="coerce",