Add alias for iterator fold
fold is known in python and javascript as reduce, not sure about inject but it was written in doc there.
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@ -1977,6 +1977,8 @@ pub trait Iterator {
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/// assert_eq!(result, result2);
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/// ```
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#[inline]
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#[doc(alias = "reduce")]
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#[doc(alias = "inject")]
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#[stable(feature = "rust1", since = "1.0.0")]
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fn fold<B, F>(mut self, init: B, mut f: F) -> B
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where
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