diff --git a/sequence_extractor/cli.py b/sequence_extractor/cli.py
index b3bfeab5176ae3fd05fae2475b28e2f72488e5a8..1fc4949133d15189bd19335e85b134aecd5bf897 100644
--- a/sequence_extractor/cli.py
+++ b/sequence_extractor/cli.py
@@ -1,4 +1,4 @@
-""" command line script to be run on output fasta file from bedtools getfasta """
+"""command line script to be run on output fasta file from bedtools getfasta."""
 import argparse
 import logging
 from exon_concatenation import exon_concatenation
diff --git a/sequence_extractor/poly_a.py b/sequence_extractor/poly_a.py
index 476fb83b2918a3dcae2b734465f4d845384dcdcf..c1d8d9476d6ca0dee36155cc20342b697c165c68 100644
--- a/sequence_extractor/poly_a.py
+++ b/sequence_extractor/poly_a.py
@@ -1,9 +1,10 @@
 """This script contains two functions and the first function is called by the second function and used to add poly A tail to the concatenated exon."""
 
-s
+
 import numpy as np
 
 # To do: Taking probabilities of nucleotides from user and raising error if sum != 1
+
 def poly_a_generator(
     exon: str,
 ) -> str: