chore: Fix violations of elided_named_lifetimes (#18330)

I compile Zed from nightly build pretty often and I've noticed that
we're getting a few hits on new rustc lint:
https://github.com/rust-lang/rust/pull/129207

Release Notes:

- N/A

crates/editor/src/display_map/crease_map.rs

@@ -69,7 +69,7 @@ impl CreaseSnapshot {
         &'a self,
         range: Range<MultiBufferRow>,
         snapshot: &'a MultiBufferSnapshot,
-    ) -> impl '_ + Iterator<Item = &'a Crease> {
+    ) -> impl 'a + Iterator<Item = &'a Crease> {
         let start = snapshot.anchor_before(Point::new(range.start.0, 0));
         let mut cursor = self.creases.cursor::<ItemSummary>(snapshot);
         cursor.seek(&start, Bias::Left, snapshot);

crates/editor/src/editor.rs

@@ -11515,7 +11515,7 @@ impl Editor {
         &'a self,
         position: Anchor,
         buffer: &'a MultiBufferSnapshot,
-    ) -> impl 'a + Iterator<Item = &Range<Anchor>> {
+    ) -> impl 'a + Iterator<Item = &'a Range<Anchor>> {
         let read_highlights = self
             .background_highlights
             .get(&TypeId::of::<DocumentHighlightRead>())

crates/language/src/syntax_map.rs

@@ -794,7 +794,7 @@ impl SyntaxSnapshot {
         range: Range<usize>,
         buffer: &'a BufferSnapshot,
         query: fn(&Grammar) -> Option<&Query>,
-    ) -> SyntaxMapCaptures {
+    ) -> SyntaxMapCaptures<'a> {
         SyntaxMapCaptures::new(
             range.clone(),
             buffer.as_rope(),
@@ -808,7 +808,7 @@ impl SyntaxSnapshot {
         range: Range<usize>,
         buffer: &'a BufferSnapshot,
         query: fn(&Grammar) -> Option<&Query>,
-    ) -> SyntaxMapMatches {
+    ) -> SyntaxMapMatches<'a> {
         SyntaxMapMatches::new(
             range.clone(),
             buffer.as_rope(),
@@ -828,7 +828,7 @@ impl SyntaxSnapshot {
         range: Range<T>,
         buffer: &'a BufferSnapshot,
         include_hidden: bool,
-    ) -> impl 'a + Iterator<Item = SyntaxLayer> {
+    ) -> impl 'a + Iterator<Item = SyntaxLayer<'a>> {
         let start_offset = range.start.to_offset(buffer);
         let end_offset = range.end.to_offset(buffer);
         let start = buffer.anchor_before(start_offset);

crates/project/src/project.rs

@@ -3954,7 +3954,7 @@ impl Project {
     pub fn supplementary_language_servers<'a>(
         &'a self,
         cx: &'a AppContext,
-    ) -> impl '_ + Iterator<Item = (LanguageServerId, LanguageServerName)> {
+    ) -> impl 'a + Iterator<Item = (LanguageServerId, LanguageServerName)> {
         self.lsp_store.read(cx).supplementary_language_servers()
     }
 

crates/sum_tree/src/sum_tree.rs

@@ -345,7 +345,7 @@ impl<T: Item> SumTree<T> {
         Iter::new(self)
     }
 
-    pub fn cursor<'a, S>(&'a self, cx: &<T::Summary as Summary>::Context) -> Cursor<T, S>
+    pub fn cursor<'a, S>(&'a self, cx: &<T::Summary as Summary>::Context) -> Cursor<'a, T, S>
     where
         S: Dimension<'a, T::Summary>,
     {
@@ -358,7 +358,7 @@ impl<T: Item> SumTree<T> {
         &'a self,
         cx: &<T::Summary as Summary>::Context,
         filter_node: F,
-    ) -> FilterCursor<F, T, U>
+    ) -> FilterCursor<'a, F, T, U>
     where
         F: FnMut(&T::Summary) -> bool,
         U: Dimension<'a, T::Summary>,

crates/sum_tree/src/tree_map.rs

@@ -105,7 +105,7 @@ impl<K: Clone + Ord, V: Clone> TreeMap<K, V> {
         cursor.item().map(|item| (&item.key, &item.value))
     }
 
-    pub fn iter_from<'a>(&'a self, from: &'a K) -> impl Iterator<Item = (&K, &V)> + '_ {
+    pub fn iter_from<'a>(&'a self, from: &'a K) -> impl Iterator<Item = (&'a K, &'a V)> + 'a {
         let mut cursor = self.0.cursor::<MapKeyRef<'_, K>>(&());
         let from_key = MapKeyRef(Some(from));
         cursor.seek(&from_key, Bias::Left, &());

crates/workspace/src/workspace.rs

@@ -2119,7 +2119,7 @@ impl Workspace {
     pub fn items<'a>(
         &'a self,
         cx: &'a AppContext,
-    ) -> impl 'a + Iterator<Item = &Box<dyn ItemHandle>> {
+    ) -> impl 'a + Iterator<Item = &'a Box<dyn ItemHandle>> {
         self.panes.iter().flat_map(|pane| pane.read(cx).items())
     }