Update solution.py

kyu_4/most_frequently_used_words/solution.py

@@ -1,12 +1,15 @@
 """
-Most frequently used words in a text
+Most frequently used words in a text.
+
 Created by Egor Kostan.
 GitHub: https://github.com/ikostan
 """
 
 
 def top_3_words(text: str) -> list:
     """
+    Top 3 words function.
+
     Given a string of text (possibly with punctuation and line-breaks),
     returns an array of the top-3 most occurring words, in descending
     order of the number of occurrences.