Clippy: adjust doc first paragraph

rand_distr/src/weighted_alias.rs

@@ -275,9 +275,10 @@ where
     }
 }
 
-/// Trait that must be implemented for weights, that are used with
-/// [`WeightedAliasIndex`]. Currently no guarantees on the correctness of
-/// [`WeightedAliasIndex`] are given for custom implementations of this trait.
+/// Weight bound for [`WeightedAliasIndex`]
+///
+/// Currently no guarantees on the correctness of [`WeightedAliasIndex`] are
+/// given for custom implementations of this trait.
 pub trait AliasableWeight:
     Sized
     + Copy

src/seq/index.rs

@@ -282,10 +282,12 @@ where
     }
 }
 
-/// Randomly sample exactly `amount` distinct indices from `0..length`, and
-/// return them in an arbitrary order (there is no guarantee of shuffling or
-/// ordering). The weights are to be provided by the input function `weights`,
-/// which will be called once for each index.
+/// Randomly sample exactly `amount` distinct indices from `0..length`
+///
+/// Results are in arbitrary order (there is no guarantee of shuffling or
+/// ordering).
+///
+/// Function `weight` is called once for each index to provide weights.
 ///
 /// This method is used internally by the slice sampling methods, but it can
 /// sometimes be useful to have the indices themselves so this is provided as