[pre-commit.ci] auto fixes from pre-commit.com hooks

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Author: pre-commit-ci[bot]

strings/word_occurrence.py

@@ -1,6 +1,7 @@
 # Created by sarathkaul on 17/11/19
 # Modified by Arkadip Bhattacharya(@darkmatter18) on 20/04/2020
 
+
 def word_occurrence(sentence: str) -> dict[str, int]:
     """
     >>> from collections import Counter