Optimized recursive_bubble_sort (#2410)

* optimized recursive_bubble_sort

* Fixed doctest error due whitespace

* reduce loop times for optimization

* fixup! Format Python code with psf/black push

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

conversions/decimal_to_hexadecimal.py

@@ -23,39 +23,39 @@ values = {
 
 def decimal_to_hexadecimal(decimal):
     """
-        take integer decimal value, return hexadecimal representation as str beginning
-        with 0x
-        >>> decimal_to_hexadecimal(5)
-        '0x5'
-        >>> decimal_to_hexadecimal(15)
-        '0xf'
-        >>> decimal_to_hexadecimal(37)
-        '0x25'
-        >>> decimal_to_hexadecimal(255)
-        '0xff'
-        >>> decimal_to_hexadecimal(4096)
-        '0x1000'
-        >>> decimal_to_hexadecimal(999098)
-        '0xf3eba'
-        >>> # negatives work too
-        >>> decimal_to_hexadecimal(-256)
-        '-0x100'
-        >>> # floats are acceptable if equivalent to an int
-        >>> decimal_to_hexadecimal(17.0)
-        '0x11'
-        >>> # other floats will error
-        >>> decimal_to_hexadecimal(16.16) # doctest: +ELLIPSIS
-        Traceback (most recent call last):
-        ...
-        AssertionError
-        >>> # strings will error as well
-        >>> decimal_to_hexadecimal('0xfffff') # doctest: +ELLIPSIS
-        Traceback (most recent call last):
-        ...
-        AssertionError
-        >>> # results are the same when compared to Python's default hex function
-        >>> decimal_to_hexadecimal(-256) == hex(-256)
-        True
+    take integer decimal value, return hexadecimal representation as str beginning
+    with 0x
+    >>> decimal_to_hexadecimal(5)
+    '0x5'
+    >>> decimal_to_hexadecimal(15)
+    '0xf'
+    >>> decimal_to_hexadecimal(37)
+    '0x25'
+    >>> decimal_to_hexadecimal(255)
+    '0xff'
+    >>> decimal_to_hexadecimal(4096)
+    '0x1000'
+    >>> decimal_to_hexadecimal(999098)
+    '0xf3eba'
+    >>> # negatives work too
+    >>> decimal_to_hexadecimal(-256)
+    '-0x100'
+    >>> # floats are acceptable if equivalent to an int
+    >>> decimal_to_hexadecimal(17.0)
+    '0x11'
+    >>> # other floats will error
+    >>> decimal_to_hexadecimal(16.16) # doctest: +ELLIPSIS
+    Traceback (most recent call last):
+    ...
+    AssertionError
+    >>> # strings will error as well
+    >>> decimal_to_hexadecimal('0xfffff') # doctest: +ELLIPSIS
+    Traceback (most recent call last):
+    ...
+    AssertionError
+    >>> # results are the same when compared to Python's default hex function
+    >>> decimal_to_hexadecimal(-256) == hex(-256)
+    True
     """
     assert type(decimal) in (int, float) and decimal == int(decimal)
     hexadecimal = ""