What's wrong about the warning? It's there to prevent the common pitfall of expecting things like this to work right:

print (stat)[9];
[download]

His point was the warning cares about exactly one space. Why it shouldn't it give the same warning for these also?

print(stat)[9]

print              (stat)[9]
[download]

is obtuse. I'm sure there are a hundred root nodes on this site alone about abuse of white space, so I'll defer to them.