I think that we would all agree that the following strings should all produce the same results when converted to an integer:

' 1'

'01'

So, it makes sense to me, that if we remove the right-most character, they should also produce the same results when converted.

' '

'0'

We also know that trailing spaces are ignored in many cases, so the following are essentially equivalent

''

' '

So, by the law of transitivity, the result of converting all of these strings to integer should produce the same results.

''

' '

'0'

Drew