Write a function reverseWords that takes a sentence string as input and returns a new string where each word is reversed, but the order of the words remains the same.
Words are separated by spaces. Preserve the original spacing.
Example Inputs & Outputs
reverseWords("Hello World") // → "olleH dlroW"
reverseWords("JavaScript is fun") // → "tpircSavaJ si nuf"
reverseWords(" Lead and Trail ") // → " daeL dna liarT "
reverseWords("") // → ""
reverseWords("OneWord") // → "droWenO"
Constraints & Edge Cases
- Input is always a string.
- Words are defined by space characters.
- Multiple spaces between words should be preserved.
- Leading/trailing spaces should also be preserved.
- Empty string input should return an empty string.
