diff --git a/cryptomite/circulant.py b/cryptomite/circulant.py
index a42a15d..a37d8ce 100644
--- a/cryptomite/circulant.py
+++ b/cryptomite/circulant.py
@@ -8,7 +8,7 @@
 from math import floor, log2
 from typing import cast
 
-from cryptomite.utils import BitsT, conv, log_2, closest_prime
+from cryptomite.utils import BitsT, closest_prime, conv, log_2
 
 __all__ = ['Circulant']
 
@@ -71,9 +71,10 @@ def from_params(
         given the initial lengths and min-entropies of the input sources
         and generate the associated extractor.
 
-        The input_length2 must be prime, else the code will chose a valid
-        input_length2 choice and adjust the other parameters accordingly.
-        The min entropy inputs are a lower bound on the :term:`min-entropy`
+        The input_length2 must be prime, else the code will chose a
+        valid input_length2 choice and adjust the other parameters
+        accordingly.
+        The min_entropy inputs are a lower bound on the :term:`min-entropy`
         of the related input string.
 
         Parameters
@@ -114,8 +115,8 @@ def from_params(
                                          - input_length + 8 * log2_error
                                          + 8 - 4 * log2(3)))
         if output_length <= 0:
-            raise Exception('Cannot extract with these parameters. '
-                            '''Increase min_entropy1 and/or min_entropy2
+            raise Exception('''Cannot extract with these parameters.
+                            Increase min_entropy1 and/or min_entropy2
                             and/or log2_error.''')
         if verbose:
             print('Min entropy1: ', min_entropy1,