fix clippy lints

src/adaptors/mod.rs

@@ -515,7 +515,7 @@ pub struct TakeWhileRef<'a, I: 'a, F> {
     f: F,
 }
 
-impl<'a, I, F> fmt::Debug for TakeWhileRef<'a, I, F>
+impl<I, F> fmt::Debug for TakeWhileRef<'_, I, F>
 where
     I: Iterator + fmt::Debug,
 {
@@ -530,7 +530,7 @@ where
     TakeWhileRef { iter, f }
 }
 
-impl<'a, I, F> Iterator for TakeWhileRef<'a, I, F>
+impl<I, F> Iterator for TakeWhileRef<'_, I, F>
 where
     I: Iterator + Clone,
     F: FnMut(&I::Item) -> bool,

src/format.rs

@@ -47,7 +47,7 @@ where
     }
 }
 
-impl<'a, I, F> fmt::Display for FormatWith<'a, I, F>
+impl<I, F> fmt::Display for FormatWith<'_, I, F>
 where
     I: Iterator,
     F: FnMut(I::Item, &mut dyn FnMut(&dyn fmt::Display) -> fmt::Result) -> fmt::Result,
@@ -71,7 +71,7 @@ where
     }
 }
 
-impl<'a, I, F> fmt::Debug for FormatWith<'a, I, F>
+impl<I, F> fmt::Debug for FormatWith<'_, I, F>
 where
     I: Iterator,
     F: FnMut(I::Item, &mut dyn FnMut(&dyn fmt::Display) -> fmt::Result) -> fmt::Result,
@@ -81,7 +81,7 @@ where
     }
 }
 
-impl<'a, I> Format<'a, I>
+impl<I> Format<'_, I>
 where
     I: Iterator,
 {
@@ -125,7 +125,7 @@ macro_rules! impl_format {
 
 impl_format! {Display Debug UpperExp LowerExp UpperHex LowerHex Octal Binary Pointer}
 
-impl<'a, I, F> Clone for FormatWith<'a, I, F>
+impl<I, F> Clone for FormatWith<'_, I, F>
 where
     (I, F): Clone,
 {
@@ -135,7 +135,7 @@ where
             inner: Option<(I, F)>,
         }
         // This ensures we preserve the state of the original `FormatWith` if `Clone` panics
-        impl<'r, 'a, I, F> Drop for PutBackOnDrop<'r, 'a, I, F> {
+        impl<I, F> Drop for PutBackOnDrop<'_, '_, I, F> {
             fn drop(&mut self) {
                 self.into.inner.set(self.inner.take())
             }
@@ -151,7 +151,7 @@ where
     }
 }
 
-impl<'a, I> Clone for Format<'a, I>
+impl<I> Clone for Format<'_, I>
 where
     I: Clone,
 {
@@ -161,7 +161,7 @@ where
             inner: Option<I>,
         }
         // This ensures we preserve the state of the original `FormatWith` if `Clone` panics
-        impl<'r, 'a, I> Drop for PutBackOnDrop<'r, 'a, I> {
+        impl<I> Drop for PutBackOnDrop<'_, '_, I> {
             fn drop(&mut self) {
                 self.into.inner.set(self.inner.take())
             }

src/lib.rs

@@ -1055,7 +1055,6 @@ pub trait Itertools: Iterator {
     /// let it = a.merge_by(b, |x, y| x.1 <= y.1);
     /// itertools::assert_equal(it, vec![(0, 'a'), (0, 'b'), (1, 'c'), (1, 'd')]);
     /// ```
-
     fn merge_by<J, F>(self, other: J, is_first: F) -> MergeBy<Self, J::IntoIter, F>
     where
         Self: Sized,

src/peeking_take_while.rs

@@ -22,7 +22,7 @@ pub trait PeekingNext: Iterator {
         F: FnOnce(&Self::Item) -> bool;
 }
 
-impl<'a, I> PeekingNext for &'a mut I
+impl<I> PeekingNext for &mut I
 where
     I: PeekingNext,
 {
@@ -133,7 +133,7 @@ where
     PeekingTakeWhile { iter, f }
 }
 
-impl<'a, I, F> Iterator for PeekingTakeWhile<'a, I, F>
+impl<I, F> Iterator for PeekingTakeWhile<'_, I, F>
 where
     I: PeekingNext,
     F: FnMut(&I::Item) -> bool,
@@ -148,7 +148,7 @@ where
     }
 }
 
-impl<'a, I, F> PeekingNext for PeekingTakeWhile<'a, I, F>
+impl<I, F> PeekingNext for PeekingTakeWhile<'_, I, F>
 where
     I: PeekingNext,
     F: FnMut(&I::Item) -> bool,

src/process_results_impl.rs

@@ -13,7 +13,7 @@ pub struct ProcessResults<'a, I, E: 'a> {
     iter: I,
 }
 
-impl<'a, I, E> ProcessResults<'a, I, E> {
+impl<I, E> ProcessResults<'_, I, E> {
     #[inline(always)]
     fn next_body<T>(&mut self, item: Option<Result<T, E>>) -> Option<T> {
         match item {
@@ -27,7 +27,7 @@ impl<'a, I, E> ProcessResults<'a, I, E> {
     }
 }
 
-impl<'a, I, T, E> Iterator for ProcessResults<'a, I, E>
+impl<I, T, E> Iterator for ProcessResults<'_, I, E>
 where
     I: Iterator<Item = Result<T, E>>,
 {
@@ -60,7 +60,7 @@ where
     }
 }
 
-impl<'a, I, T, E> DoubleEndedIterator for ProcessResults<'a, I, E>
+impl<I, T, E> DoubleEndedIterator for ProcessResults<'_, I, E>
 where
     I: Iterator<Item = Result<T, E>>,
     I: DoubleEndedIterator,

src/rciter_impl.rs

@@ -87,7 +87,7 @@ where
 }
 
 /// Return an iterator from `&RcIter<I>` (by simply cloning it).
-impl<'a, I> IntoIterator for &'a RcIter<I>
+impl<I> IntoIterator for &RcIter<I>
 where
     I: Iterator,
 {