Add doc example for `OsString::reserve_exact`.
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@ -210,6 +210,16 @@ impl OsString {
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/// Note that the allocator may give the collection more space than it
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/// requests. Therefore capacity can not be relied upon to be precisely
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/// minimal. Prefer reserve if future insertions are expected.
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///
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/// # Examples
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///
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/// ```
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/// use std::ffi::OsString;
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///
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/// let mut s = OsString::new();
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/// s.reserve_exact(10);
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/// assert!(s.capacity() >= 10);
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/// ```
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#[stable(feature = "osstring_simple_functions", since = "1.9.0")]
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pub fn reserve_exact(&mut self, additional: usize) {
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self.inner.reserve_exact(additional)
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