fix typos

source/Data_Types.rst

@@ -172,7 +172,7 @@ create a representation in fasta format of following sequence :
    >>> s = "{name} {comment} \n{sequence}".format(id= id, comment = comment, sequence = sequence)
    or
    >>> s = f""{name} {comment} \n{sequence}"
-   
+
    
 Exercise
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