Well, yes, but...
The time when the typer decides to return the carriage is up to the user. The bell could ring and the user could say "hmmm... I can fit the 'for' in there."
I believe the documents are forgeries, but this is not definitive proof by any stretch of the imagination. It does help with the "piling on" of evidence, though.
It may not seem definitive, until you see that the actual memo wordwrap exactly coincides with what MSWORD produces. What are the odds that a manual typist, over the span of 4 memos, would exactly choose to squeeze in the EXACT SAME words, so as to "accidentally" coincide with what MSWORD would produce. I would say, with metaphysical certitude that the odds are nil.