/// Ensures that the buffer contains at least enough space to hold `len +
/// additional` elements. If it doesn't already have enough capacity, will
/// reallocate enough space plus comfortable slack space to get amortized
- /// `O(1)` behavior. Will limit this behavior if it would needlessly cause
+ /// *O*(1) behavior. Will limit this behavior if it would needlessly cause
/// itself to panic.
///
/// If `len` exceeds `self.capacity()`, this may fail to actually allocate
/// `Vec` does not guarantee any particular growth strategy when reallocating
/// when full, nor when [`reserve`] is called. The current strategy is basic
/// and it may prove desirable to use a non-constant growth factor. Whatever
-/// strategy is used will of course guarantee `O(1)` amortized [`push`].
+/// strategy is used will of course guarantee *O*(1) amortized [`push`].
///
/// `vec![x; n]`, `vec![a, b, c, d]`, and
/// [`Vec::with_capacity(n)`][`Vec::with_capacity`], will all produce a `Vec`
/// self`. Equivalent to `&self[0 .. len]` or `&mut self[0 .. len]`. Unlike
/// other indexing operations, this can never panic.
///
-/// This operation is `O(1)`.
+/// This operation is *O*(1).
///
/// Prior to 1.20.0, these indexing operations were still supported by
/// direct implementation of `Index` and `IndexMut`.
/// Returns a slice of the given string from the byte range
/// [`begin`, `end`).
///
-/// This operation is `O(1)`.
+/// This operation is *O*(1).
///
/// Prior to 1.20.0, these indexing operations were still supported by
/// direct implementation of `Index` and `IndexMut`.
/// Returns a slice of the given string from the byte range [`0`, `end`).
/// Equivalent to `&self[0 .. end]` or `&mut self[0 .. end]`.
///
-/// This operation is `O(1)`.
+/// This operation is *O*(1).
///
/// Prior to 1.20.0, these indexing operations were still supported by
/// direct implementation of `Index` and `IndexMut`.
/// `len`). Equivalent to `&self[begin .. len]` or `&mut self[begin ..
/// len]`.
///
-/// This operation is `O(1)`.
+/// This operation is *O*(1).
///
/// Prior to 1.20.0, these indexing operations were still supported by
/// direct implementation of `Index` and `IndexMut`.
/// self[begin .. end + 1]`, except if `end` has the maximum value for
/// `usize`.
///
-/// This operation is `O(1)`.
+/// This operation is *O*(1).
///
/// # Panics
///
/// Equivalent to `&self [0 .. end + 1]`, except if `end` has the maximum
/// value for `usize`.
///
-/// This operation is `O(1)`.
+/// This operation is *O*(1).
///
/// # Panics
///