Fix clippy 1.80 lints

If documentation should be part of bullet point, we need to indent.

src/diff.rs

@@ -1,7 +1,7 @@
 //! "Diff"ing iterators for caching elements to sequential collections without requiring the new
 //! elements' iterator to be `Clone`.
 //!
-//! - [`Diff`] (produced by the [`diff_with`] function)
+//! [`Diff`] (produced by the [`diff_with`] function)
 //! describes the difference between two non-`Clone` iterators `I` and `J` after breaking ASAP from
 //! a lock-step comparison.
 

src/lib.rs

@@ -427,13 +427,13 @@ macro_rules! chain {
 /// This trait defines a number of methods. They are divided into two groups:
 ///
 /// * *Adaptors* take an iterator and parameter as input, and return
-/// a new iterator value. These are listed first in the trait. An example
-/// of an adaptor is [`.interleave()`](Itertools::interleave)
+///   a new iterator value. These are listed first in the trait. An example
+///   of an adaptor is [`.interleave()`](Itertools::interleave)
 ///
 /// * *Regular methods* are those that don't return iterators and instead
-/// return a regular value of some other kind.
-/// [`.next_tuple()`](Itertools::next_tuple) is an example and the first regular
-/// method in the list.
+///   return a regular value of some other kind.
+///   [`.next_tuple()`](Itertools::next_tuple) is an example and the first regular
+///   method in the list.
 pub trait Itertools: Iterator {
     // adaptors