diff --git a/bit_manipulation/README.md b/bit_manipulation/README.md
index 2ef166152..e5f82a270 100644
--- a/bit_manipulation/README.md
+++ b/bit_manipulation/README.md
@@ -1,7 +1,6 @@
-https://docs.python.org/3/reference/expressions.html#binary-bitwise-operations
-https://docs.python.org/3/reference/expressions.html#unary-arithmetic-and-bitwise-operations
-https://docs.python.org/3/library/stdtypes.html#bitwise-operations-on-integer-types
-
-https://wiki.python.org/moin/BitManipulation
-https://wiki.python.org/moin/BitwiseOperators
-https://www.tutorialspoint.com/python3/bitwise_operators_example.htm
+* https://docs.python.org/3/reference/expressions.html#binary-bitwise-operations
+* https://docs.python.org/3/reference/expressions.html#unary-arithmetic-and-bitwise-operations
+* https://docs.python.org/3/library/stdtypes.html#bitwise-operations-on-integer-types
+* https://wiki.python.org/moin/BitManipulation
+* https://wiki.python.org/moin/BitwiseOperators
+* https://www.tutorialspoint.com/python3/bitwise_operators_example.htm
diff --git a/bit_manipulation/binary_and_operator.py b/bit_manipulation/binary_and_operator.py
index 191ff8eb4..36f6c668d 100644
--- a/bit_manipulation/binary_and_operator.py
+++ b/bit_manipulation/binary_and_operator.py
@@ -22,7 +22,7 @@ def binary_and(a: int, b: int) -> str:
     >>> binary_and(0, -1)
     Traceback (most recent call last):
         ...
-    ValueError: the value of both input must be positive
+    ValueError: the value of both inputs must be positive
     >>> binary_and(0, 1.1)
     Traceback (most recent call last):
         ...
@@ -33,7 +33,7 @@ def binary_and(a: int, b: int) -> str:
     TypeError: '<' not supported between instances of 'str' and 'int'
     """
     if a < 0 or b < 0:
-        raise ValueError("the value of both input must be positive")
+        raise ValueError("the value of both inputs must be positive")
 
     a_binary = str(bin(a))[2:]  # remove the leading "0b"
     b_binary = str(bin(b))[2:]  # remove the leading "0b"
diff --git a/bit_manipulation/binary_or_operator.py b/bit_manipulation/binary_or_operator.py
index dabf5bcb0..95f61f1da 100644
--- a/bit_manipulation/binary_or_operator.py
+++ b/bit_manipulation/binary_or_operator.py
@@ -21,7 +21,7 @@ def binary_or(a: int, b: int) -> str:
     >>> binary_or(0, -1)
     Traceback (most recent call last):
         ...
-    ValueError: the value of both input must be positive
+    ValueError: the value of both inputs must be positive
     >>> binary_or(0, 1.1)
     Traceback (most recent call last):
         ...
@@ -32,7 +32,7 @@ def binary_or(a: int, b: int) -> str:
     TypeError: '<' not supported between instances of 'str' and 'int'
     """
     if a < 0 or b < 0:
-        raise ValueError("the value of both input must be positive")
+        raise ValueError("the value of both inputs must be positive")
     a_binary = str(bin(a))[2:]  # remove the leading "0b"
     b_binary = str(bin(b))[2:]
     max_len = max(len(a_binary), len(b_binary))
diff --git a/bit_manipulation/binary_xor_operator.py b/bit_manipulation/binary_xor_operator.py
index 6f8962192..6206c70a9 100644
--- a/bit_manipulation/binary_xor_operator.py
+++ b/bit_manipulation/binary_xor_operator.py
@@ -22,7 +22,7 @@ def binary_xor(a: int, b: int) -> str:
     >>> binary_xor(0, -1)
     Traceback (most recent call last):
         ...
-    ValueError: the value of both input must be positive
+    ValueError: the value of both inputs must be positive
     >>> binary_xor(0, 1.1)
     Traceback (most recent call last):
         ...
@@ -33,7 +33,7 @@ def binary_xor(a: int, b: int) -> str:
     TypeError: '<' not supported between instances of 'str' and 'int'
     """
     if a < 0 or b < 0:
-        raise ValueError("the value of both input must be positive")
+        raise ValueError("the value of both inputs must be positive")
 
     a_binary = str(bin(a))[2:]  # remove the leading "0b"
     b_binary = str(bin(b))[2:]  # remove the leading "0b"
diff --git a/sorts/bead_sort.py b/sorts/bead_sort.py
index 26a3fabc4..d22367c52 100644
--- a/sorts/bead_sort.py
+++ b/sorts/bead_sort.py
@@ -21,15 +21,15 @@ def bead_sort(sequence: list) -> list:
     >>> bead_sort([1, .9, 0.0, 0, -1, -.9])
     Traceback (most recent call last):
     ...
-    TypeError: Sequence must be list of nonnegative integers
+    TypeError: Sequence must be list of non-negative integers
 
     >>> bead_sort("Hello world")
     Traceback (most recent call last):
     ...
-    TypeError: Sequence must be list of nonnegative integers
+    TypeError: Sequence must be list of non-negative integers
     """
     if any(not isinstance(x, int) or x < 0 for x in sequence):
-        raise TypeError("Sequence must be list of nonnegative integers")
+        raise TypeError("Sequence must be list of non-negative integers")
     for _ in range(len(sequence)):
         for i, (rod_upper, rod_lower) in enumerate(zip(sequence, sequence[1:])):
             if rod_upper > rod_lower:
diff --git a/sorts/double_sort.py b/sorts/double_sort.py
index 04e186820..4e08e27b3 100644
--- a/sorts/double_sort.py
+++ b/sorts/double_sort.py
@@ -1,7 +1,7 @@
 def double_sort(lst):
-    """this sorting algorithm sorts an array using the principle of bubble sort,
-    but does it both from left to right and right to left,
-    hence i decided to call it "double sort"
+    """This sorting algorithm sorts an array using the principle of bubble sort,
+    but does it both from left to right and right to left.
+    Hence, it's called "Double sort"
     :param collection: mutable ordered sequence of elements
     :return: the same collection in ascending order
     Examples: