Use try_fold in default implementation of collect_seq, collect_map #2077
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I noticed this in https://github.com/jonasbb/serde_with/blob/c578069eab2f64fd672b6dbd40068b36dd256f84/src/rust.rs#L1174 and it seems like a good idea because some iterator adapters, like
Chain, are able to perform more efficiently in internal iteration than external iteration. See https://doc.rust-lang.org/1.54.0/std/iter/trait.Iterator.html#method.for_each.