avoid ever setting split_at to 0
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@ -260,7 +260,7 @@ impl State {
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while i > 0 && !remaining.is_char_boundary(i) { i -= 1; }
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// To avoid splitting mid-word, see if there was a space recently
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let mut j = i;
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while j > 0 && j > i-10 && remaining.as_bytes()[j] != b' ' { j -= 1; }
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while j > 1 && j > i-10 && remaining.as_bytes()[j] != b' ' { j -= 1; }
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if remaining.as_bytes()[j] == b' ' { j }
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else if i == 0 { max_msg } else { i }
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};
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