The doc (41.1 Drawing Automata) says "Let us consider a nondeterministic four state automaton". Well, it is deterministic. I know that deterministic automata are nondeterministic by definition, but in the context of the documentation, saying "deterministic" or not saying about determinism, would be just as good.
While at it, the doc for "/pgf/arrow keys/width'" reads (see the "paraemter")
The key (note the prime) has a similar effect as the width key. The difference is that the second, still optional paraemter ⟨length factor⟩ specifies the width of the key not as a multiple of the line width, but as a multiple of the arrow length.
I decided that I don't care.
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