In an AIG PC Global Services mobile workflow, you need a utility function that reverses a string. Given a string s, return a new string with its characters in reverse order.
Formal Specification
Input: A single string s
Output: A string containing the characters of s in reverse order
Function behavior: The function must return the reversed string and should handle empty strings, spaces, punctuation, and Unicode characters.
Constraints
0 <= len(s) <= 10^5
s may contain letters, digits, spaces, punctuation, and Unicode characters
The function should return the reversed string in O(n) time
Function Signature
defreverse_string(s):
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