Indicate None is code-like in doc comments
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@ -179,8 +179,8 @@ pub trait Iterator {
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/// Creates an iterator that iterates over both this and the specified
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/// iterators simultaneously, yielding the two elements as pairs. When
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/// either iterator returns None, all further invocations of next() will
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/// return None.
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/// either iterator returns `None`, all further invocations of next() will
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/// return `None`.
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///
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/// # Examples
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///
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@ -254,7 +254,7 @@ pub trait Iterator {
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}
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/// Creates an iterator that both filters and maps elements.
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/// If the specified function returns None, the element is skipped.
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/// If the specified function returns `None`, the element is skipped.
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/// Otherwise the option is unwrapped and the new value is yielded.
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///
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/// # Examples
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@ -403,7 +403,7 @@ pub trait Iterator {
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/// Creates a new iterator that behaves in a similar fashion to fold.
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/// There is a state which is passed between each iteration and can be
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/// mutated as necessary. The yielded values from the closure are yielded
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/// from the Scan instance when not None.
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/// from the Scan instance when not `None`.
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///
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/// # Examples
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///
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@ -701,7 +701,7 @@ pub trait Iterator {
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/// Returns the index of the last element satisfying the specified predicate
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///
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/// If no element matches, None is returned.
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/// If no element matches, `None` is returned.
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///
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/// Does not consume the iterator *before* the first found element.
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///
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