diff --git a/docs/index_en.rst b/docs/index_en.rst
index 6d864cbd80d..f9f0fdc16d5 100644
--- a/docs/index_en.rst
+++ b/docs/index_en.rst
@@ -3,9 +3,11 @@
 
 ..  toctree::
     :maxdepth: 1
-	
+
+
     install/index_en.rst
     guides/index_en.rst
     api/index_en.rst
     dev_guides/index_en.rst
     release_note_en.md
+