diff --git a/helix-lsp/src/client.rs b/helix-lsp/src/client.rs
index 1d84c4f3..74f5fa06 100644
--- a/helix-lsp/src/client.rs
+++ b/helix-lsp/src/client.rs
@@ -384,11 +384,13 @@ impl Client {
         let capabilities = self.capabilities.as_ref().unwrap();
 
         let sync_capabilities = match capabilities.text_document_sync {
-            Some(lsp::TextDocumentSyncCapability::Kind(kind)) => kind,
-            Some(lsp::TextDocumentSyncCapability::Options(lsp::TextDocumentSyncOptions {
-                change: Some(kind),
-                ..
-            })) => kind,
+            Some(
+                lsp::TextDocumentSyncCapability::Kind(kind)
+                | lsp::TextDocumentSyncCapability::Options(lsp::TextDocumentSyncOptions {
+                    change: Some(kind),
+                    ..
+                }),
+            ) => kind,
             // None | SyncOptions { changes: None }
             _ => return Ok(()),
         };
@@ -537,9 +539,8 @@ impl Client {
         let capabilities = self.capabilities.as_ref().unwrap();
 
         // check if we're able to format
-        let _capabilities = match capabilities.document_formatting_provider {
-            Some(lsp::OneOf::Left(true)) => (),
-            Some(lsp::OneOf::Right(_)) => (),
+        match capabilities.document_formatting_provider {
+            Some(lsp::OneOf::Left(true) | lsp::OneOf::Right(_)) => (),
             // None | Some(false)
             _ => return Ok(Vec::new()),
         };
@@ -567,9 +568,8 @@ impl Client {
         let capabilities = self.capabilities.as_ref().unwrap();
 
         // check if we're able to format
-        let _capabilities = match capabilities.document_range_formatting_provider {
-            Some(lsp::OneOf::Left(true)) => (),
-            Some(lsp::OneOf::Right(_)) => (),
+        match capabilities.document_range_formatting_provider {
+            Some(lsp::OneOf::Left(true) | lsp::OneOf::Right(_)) => (),
             // None | Some(false)
             _ => return Ok(Vec::new()),
         };
diff --git a/helix-lsp/src/transport.rs b/helix-lsp/src/transport.rs
index ff1eedaf..d3e25b9c 100644
--- a/helix-lsp/src/transport.rs
+++ b/helix-lsp/src/transport.rs
@@ -19,7 +19,7 @@ use smol::{
     Executor,
 };
 
-pub(crate) enum Payload {
+pub enum Payload {
     Request {
         chan: Sender<Result<Value>>,
         value: jsonrpc::MethodCall,
@@ -40,7 +40,7 @@ enum Message {
     Call(jsonrpc::Call),
 }
 
-pub(crate) struct Transport {
+pub struct Transport {
     incoming: Sender<jsonrpc::Call>,
     outgoing: Receiver<Payload>,
 
@@ -68,8 +68,8 @@ impl Transport {
             stderr,
             incoming,
             outgoing,
-            pending_requests: Default::default(),
-            headers: Default::default(),
+            pending_requests: HashMap::default(),
+            headers: HashMap::default(),
         };
 
         ex.spawn(transport.duplex()).detach();
diff --git a/helix-term/src/application.rs b/helix-term/src/application.rs
index 2a813081..53fd086b 100644
--- a/helix-term/src/application.rs
+++ b/helix-term/src/application.rs
@@ -122,7 +122,7 @@ impl Application {
     pub fn handle_terminal_events(&mut self, event: Option<Result<Event, crossterm::ErrorKind>>) {
         let mut cx = crate::compositor::Context {
             editor: &mut self.editor,
-            executor: &self.executor,
+            executor: self.executor,
             callbacks: &mut self.callbacks,
             scroll: None,
         };
diff --git a/helix-term/src/commands.rs b/helix-term/src/commands.rs
index 844cb429..9da65813 100644
--- a/helix-term/src/commands.rs
+++ b/helix-term/src/commands.rs
@@ -14,6 +14,7 @@ use crate::{
     ui::{self, Completion, Picker, Popup, Prompt, PromptEvent},
 };
 
+use std::borrow::Cow;
 use std::path::{Path, PathBuf};
 
 use helix_view::{
@@ -333,7 +334,7 @@ where
             let text = doc.text().slice(..);
 
             let selection = doc.selection(view_id).transform(|mut range| {
-                if let Some(pos) = search::find_nth_next(text, ch, range.head, count, inclusive) {
+                search::find_nth_next(text, ch, range.head, count, inclusive).map_or(range, |pos| {
                     if extend {
                         Range::new(range.anchor, pos)
                     } else {
@@ -341,9 +342,7 @@ where
                         Range::new(range.head, pos)
                     }
                     // or (pos, pos) to move to found val
-                } else {
-                    range
-                }
+                })
             });
 
             doc.set_selection(view_id, selection);
@@ -642,7 +641,7 @@ fn _search(doc: &mut Document, view_id: ViewId, contents: &str, regex: &Regex) {
     let start = doc.selection(view_id).cursor();
 
     // TODO: use find_at to find the next match after the cursor, loop around the end
-    if let Some(mat) = regex.find_at(&contents, start) {
+    if let Some(mat) = regex.find_at(contents, start) {
         let start = text.byte_to_char(mat.start());
         let end = text.byte_to_char(mat.end());
         let selection = Selection::single(start, end - 1);
@@ -859,15 +858,15 @@ pub fn command_mode(cx: &mut Context) {
             let parts = input.split_ascii_whitespace().collect::<Vec<&str>>();
 
             match *parts.as_slice() {
-                ["q"] | ["quit"] => {
+                ["q" | "quit"] => {
                     editor.close(editor.view().id);
                     // editor.should_close = true,
                 }
-                ["o", path] | ["open", path] => {
+                ["o" | "open", path] => {
                     use helix_view::editor::Action;
                     editor.open(path.into(), Action::Replace);
                 }
-                ["w"] | ["write"] => {
+                ["w" | "write"] => {
                     // TODO: non-blocking via save() command
                     let id = editor.view().doc;
                     let doc = &mut editor.documents[id];
@@ -1487,7 +1486,7 @@ pub fn yank(cx: &mut Context) {
     let values: Vec<String> = doc
         .selection(view_id)
         .fragments(doc.text().slice(..))
-        .map(|cow| cow.into_owned())
+        .map(Cow::into_owned)
         .collect();
 
     // TODO: allow specifying reg
diff --git a/helix-term/src/main.rs b/helix-term/src/main.rs
index dc6f31f4..33792947 100644
--- a/helix-term/src/main.rs
+++ b/helix-term/src/main.rs
@@ -77,7 +77,7 @@ fn main() {
     use helix_core::syntax::{Loader, LOADER};
     let toml = include_str!("../../languages.toml");
     LOADER.get_or_init(|| {
-        let config = toml::from_str(&toml).expect("Could not parse languages.toml");
+        let config = toml::from_str(toml).expect("Could not parse languages.toml");
         Loader::new(config)
     });
 
diff --git a/helix-term/src/ui/editor.rs b/helix-term/src/ui/editor.rs
index 7ceeb6ca..d0822500 100644
--- a/helix-term/src/ui/editor.rs
+++ b/helix-term/src/ui/editor.rs
@@ -58,13 +58,13 @@ impl EditorView {
             viewport.width - OFFSET,
             viewport.height.saturating_sub(1),
         ); // - 1 for statusline
-        self.render_buffer(&doc, view, area, surface, theme, is_focused);
+        self.render_buffer(doc, view, area, surface, theme, is_focused);
 
         // clear with background color
         // TODO: this seems to prevent setting style later
         // surface.set_style(viewport, theme.get("ui.background"));
 
-        self.render_diagnostics(&doc, view, area, surface, theme, is_focused);
+        self.render_diagnostics(doc, view, area, surface, theme, is_focused);
 
         let area = Rect::new(
             viewport.x,
@@ -72,7 +72,7 @@ impl EditorView {
             viewport.width,
             1,
         );
-        self.render_statusline(&doc, area, surface, theme, is_focused);
+        self.render_statusline(doc, area, surface, theme, is_focused);
 
         // render status
         if let Some(status_msg) = &self.status_msg {
diff --git a/helix-term/src/ui/menu.rs b/helix-term/src/ui/menu.rs
index 5c3ff654..fbd25a6d 100644
--- a/helix-term/src/ui/menu.rs
+++ b/helix-term/src/ui/menu.rs
@@ -90,13 +90,13 @@ impl<T> Menu<T> {
 
     pub fn move_up(&mut self) {
         // TODO: wrap around to end
-        let pos = self.cursor.map(|i| i.saturating_sub(1)).unwrap_or(0) % self.options.len();
+        let pos = self.cursor.map_or(0, |i| i.saturating_sub(1)) % self.options.len();
         self.cursor = Some(pos);
         self.adjust_scroll();
     }
 
     pub fn move_down(&mut self) {
-        let pos = self.cursor.map(|i| i + 1).unwrap_or(0) % self.options.len();
+        let pos = self.cursor.map_or(0, |i| i + 1) % self.options.len();
         self.cursor = Some(pos);
         self.adjust_scroll();
     }
diff --git a/helix-term/src/ui/mod.rs b/helix-term/src/ui/mod.rs
index 341a30e0..479e684a 100644
--- a/helix-term/src/ui/mod.rs
+++ b/helix-term/src/ui/mod.rs
@@ -149,10 +149,7 @@ pub mod completers {
             .build()
             .filter_map(|file| {
                 file.ok().map(|entry| {
-                    let is_dir = entry
-                        .file_type()
-                        .map(|entry| entry.is_dir())
-                        .unwrap_or(false);
+                    let is_dir = entry.file_type().map_or(false, |entry| entry.is_dir());
 
                     let mut path = entry.path().strip_prefix(&dir).unwrap().to_path_buf();
 
diff --git a/helix-term/src/ui/prompt.rs b/helix-term/src/ui/prompt.rs
index c61f0bd1..3588853e 100644
--- a/helix-term/src/ui/prompt.rs
+++ b/helix-term/src/ui/prompt.rs
@@ -81,8 +81,7 @@ impl Prompt {
         if self.completion.is_empty() {
             return;
         }
-        let index =
-            self.completion_selection_index.map(|i| i + 1).unwrap_or(0) % self.completion.len();
+        let index = self.completion_selection_index.map_or(0, |i| i + 1) % self.completion.len();
         self.completion_selection_index = Some(index);
 
         let (range, item) = &self.completion[index];
@@ -183,11 +182,7 @@ impl Component for Prompt {
             // char or shift char
             KeyEvent {
                 code: KeyCode::Char(c),
-                modifiers: KeyModifiers::NONE,
-            }
-            | KeyEvent {
-                code: KeyCode::Char(c),
-                modifiers: KeyModifiers::SHIFT,
+                modifiers: KeyModifiers::NONE | KeyModifiers::SHIFT,
             } => {
                 self.insert_char(c);
                 (self.callback_fn)(cx.editor, &self.line, PromptEvent::Update);
diff --git a/helix-view/src/document.rs b/helix-view/src/document.rs
index 93b5e854..d63e8591 100644
--- a/helix-view/src/document.rs
+++ b/helix-view/src/document.rs
@@ -242,7 +242,7 @@ impl Document {
             });
         }
 
-        let success = self._apply(&transaction, view_id);
+        let success = self._apply(transaction, view_id);
 
         self.modified = true;
         // TODO: be smarter about modified by keeping track of saved version instead. That way if
@@ -342,8 +342,7 @@ impl Document {
         self.language
             .as_ref()
             .and_then(|config| config.indent.as_ref())
-            .map(|config| config.tab_width)
-            .unwrap_or(4) // fallback to 4 columns
+            .map_or(4, |config| config.tab_width) // fallback to 4 columns
     }
 
     /// Returns a string containing a single level of indentation.
@@ -351,8 +350,7 @@ impl Document {
         self.language
             .as_ref()
             .and_then(|config| config.indent.as_ref())
-            .map(|config| config.unit.as_str())
-            .unwrap_or("  ") // fallback to 2 spaces
+            .map_or("  ", |config| config.unit.as_str()) // fallback to 2 spaces
 
         // " ".repeat(TAB_WIDTH)
     }
diff --git a/helix-view/src/editor.rs b/helix-view/src/editor.rs
index f74bbb13..b2408eb9 100644
--- a/helix-view/src/editor.rs
+++ b/helix-view/src/editor.rs
@@ -16,6 +16,7 @@ pub struct Editor {
     pub executor: &'static smol::Executor<'static>,
 }
 
+#[derive(Copy, Clone)]
 pub enum Action {
     Replace,
     HorizontalSplit,
diff --git a/helix-view/src/tree.rs b/helix-view/src/tree.rs
index f7ef7806..5fed2d5a 100644
--- a/helix-view/src/tree.rs
+++ b/helix-view/src/tree.rs
@@ -29,14 +29,14 @@ pub enum Content {
 
 impl Node {
     pub fn container(layout: Layout) -> Self {
-        Node {
+        Self {
             parent: ViewId::default(),
             content: Content::Container(Box::new(Container::new(layout))),
         }
     }
 
     pub fn view(view: View) -> Self {
-        Node {
+        Self {
             parent: ViewId::default(),
             content: Content::View(Box::new(view)),
         }
@@ -414,15 +414,12 @@ impl Tree {
         let mut iter = iter.skip_while(|&(key, _view)| key != self.focus);
         iter.next(); // take the focused value
 
-        match iter.next() {
-            Some((key, _)) => {
-                self.focus = key;
-            }
-            None => {
-                // extremely crude, take the first item again
-                let (key, _) = self.traverse().next().unwrap();
-                self.focus = key;
-            }
+        if let Some((key, _)) = iter.next() {
+            self.focus = key;
+        } else {
+            // extremely crude, take the first item again
+            let (key, _) = self.traverse().next().unwrap();
+            self.focus = key;
         }
     }
 }