Write char_count(s) returning a dict of each character's count: "aab" → {"a": 2, "b": 1}.
char_count(s)
"aab"
{"a": 2, "b": 1}
char_count('aab') → {'a': 2, 'b': 1}
char_count('') → {}
Submit runs 4 tests, including hidden edge cases.
Run your code to see the output here.