One small step for *a* man

Software helps solve moon mystery – Space News –
“That’s one small step for man, one giant leap for Mankind.”
Perhaps not. For years Armstrong has insisted he said “for a man”. An Australian programmer believes that, in analysis of the tape, that he has found that Armstrong DID say “for a man”.
I am sure that Armstrong’s English teachers might breathe a sigh of relief if this is true.
On the other hand, Roddenberry has definitively and permanently made splitting infinitives acceptable English. “To boldly go…”