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Question:
What is the code to be used to trim whitespaces?

Option A):
let trimmed = for(l in lines));
Option B):
let trimmed = (trim(l));
Option C):
let trimmed = l.trim();
Option D):
let trimmed = (l.trim() for (l in lines));

Correct Answer is Option D):
let trimmed = (l.trim() for (l in lines));