diff --git a/source/Input_Output.rst b/source/Input_Output.rst
index 08ad21bc555af92ae33f7aa8cc6afcf2e287387b..9f80dc4bb6d40201541951bc30c67e726dbe97b1 100644
--- a/source/Input_Output.rst
+++ b/source/Input_Output.rst
@@ -144,7 +144,7 @@ query start, query end, subject start, subject end, Expect value, HSP bit score.
 | sort the hits by their *percent identity* in the descending order.
 | write the results in a new file.
 
-(adapted from *managing your biological data with python* p138) ::
+(adapted from *managing your biological data with python* p138) 
 
 .. literalinclude:: _static/code/parse_blast.py
    :linenos: