refa: add docstrings

Author: JCPedroza

algorithms_and_data_structures/algorithms/sorting/bubble_sort/README.md

@@ -1,26 +1,26 @@
-Bubble Sort
-==============
+# Bubble Sort
 
-Repeatedly steps through the list, compares adjacent elements and swaps them if
-they are in the wrong order. The pass through the list is repeated until the
-list is sorted.
+* Repeatedly iterate through the list, one item at a time
+* Compare current item with its right neighbor, swap if they are not in order
+* Go to next number
+* Repeat unit list is ordered
 
-Time Complexity
----------------
+## Complexity Analysis
+
+### Time Complexity
 
 - Best: `O(n)`
-- Worst: `O(n^2)`
 - Average: `O(n^2)`
+- Worst: `O(n^2)`
 
-Space Complexity
-----------------
+### Space Complexity
 
 - Total: `O(n)`
 - Auxiliary: `O(1)`
 
-Resources
----------
+## Resources
 
-- Insertion Sort at Wikipedia: https://en.wikipedia.org/wiki/Bubble_sort
-- Insertion Sort at Rosetta Code: https://rosettacode.org/wiki/Sorting_algorithms/Bubble_sort
-- Insertion Sort at freeCodeCamp: https://www.freecodecamp.org/news/bubble-sort/
+- https://en.wikipedia.org/wiki/Bubble_sort
+- https://rosettacode.org/wiki/Sorting_algorithms/Bubble_sort
+- https://www.freecodecamp.org/news/bubble-sort/
+- https://www.programiz.com/dsa/bubble-sort