scrutiny and describing code

Question

If possible describe this code especially lines 3,5,9

https://code.sololearn.com/c88mPZNxoYI2/#py

Answer 1

It's simply finding the first letter in the word and cuts off any whitespace before that. It does this by finding the index of the first letter, and initializes a new string to the old string starting from the index.

Line 3: initializes index n to... None, i think it's better to make it 0.
Line 5: if the index n no longer points to a whitespace
Line 9: assign new string to old string starting from index n