diff --git a/HISTORY.rst b/HISTORY.rst
index a15e0c9..d8e0118 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -284,7 +284,7 @@ History
 
     * CMD_ calm days
 
-* documentation: 
+* documentation:
 
     * how to implement a new project
     * how to implement a new indicator