diff --git a/examples/markup.rs b/examples/markup.rs
index 873dd0e..8d4d8ab 100644
--- a/examples/markup.rs
+++ b/examples/markup.rs
@@ -15,7 +15,7 @@ fn main() {
     styled.append(StyledString::styled("that ", Color::Dark(BaseColor::Red)));
     styled.append(StyledString::styled(
         "cool?",
-        Style::from(Color::Light(BaseColor::Blue)).add(Effect::Bold),
+        Style::from(Color::Light(BaseColor::Blue)).combine(Effect::Bold),
     ));
 
     // TextView can natively accept StyledString.
diff --git a/src/cursive.rs b/src/cursive.rs
index 28cc19a..5d5aa6f 100644
--- a/src/cursive.rs
+++ b/src/cursive.rs
@@ -383,7 +383,7 @@ impl Cursive {
     {
         self.global_callbacks
             .entry(event.into())
-            .or_insert(Vec::new())
+            .or_insert_with(Vec::new)
             .push(Callback::from_fn(cb));
     }
 
diff --git a/src/theme/palette.rs b/src/theme/palette.rs
index a2915d6..4273839 100644
--- a/src/theme/palette.rs
+++ b/src/theme/palette.rs
@@ -90,7 +90,7 @@ pub(crate) fn load_table(palette: &mut Palette, table: &toml::value::Table) {
 
 /// Color entry in a palette.
 ///
-/// Each ColorRole is used for a specific role in a default application.
+/// Each `ColorRole` is used for a specific role in a default application.
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, EnumMap)]
 pub enum PaletteColor {
     /// Color used for the application background.
diff --git a/src/theme/style.rs b/src/theme/style.rs
index 877d266..af5e87c 100644
--- a/src/theme/style.rs
+++ b/src/theme/style.rs
@@ -51,7 +51,7 @@ impl Style {
     }
 
     /// Returns a combination of `self` and `other`.
-    pub fn add<S>(self, other: S) -> Self
+    pub fn combine<S>(self, other: S) -> Self
     where
         S: Into<Style>,
     {
diff --git a/src/utils/span.rs b/src/utils/span.rs
index c8289f9..2883c14 100644
--- a/src/utils/span.rs
+++ b/src/utils/span.rs
@@ -37,7 +37,7 @@ impl<T> SpannedString<T> {
         // Make sure the spans are within bounds.
         // This should disapear when compiled in release mode.
         for span in &spans {
-            if let IndexedCow::Borrowed { start: _, end } = span.content {
+            if let IndexedCow::Borrowed { end, .. } = span.content {
                 assert!(end <= source.len());
             }
         }
@@ -66,14 +66,14 @@ impl<T> SpannedString<T> {
         S: Into<Self>,
     {
         let other = other.into();
-        self.append_raw(other.source, other.spans);
+        self.append_raw(&other.source, other.spans);
     }
 
     /// Appends `content` and its corresponding spans to the end.
     ///
     /// It is not recommended to use this directly;
     /// instead, look at the `append` method.
-    pub fn append_raw(&mut self, source: String, spans: Vec<IndexedSpan<T>>) {
+    pub fn append_raw(&mut self, source: &str, spans: Vec<IndexedSpan<T>>) {
         let offset = self.source.len();
         let mut spans = spans;
 
@@ -170,7 +170,7 @@ impl IndexedCow {
     pub fn resolve<'a>(&'a self, source: &'a str) -> &'a str {
         match *self {
             IndexedCow::Borrowed { start, end } => &source[start..end],
-            IndexedCow::Owned(ref content) => &content,
+            IndexedCow::Owned(ref content) => content,
         }
     }
 
diff --git a/src/views/dialog.rs b/src/views/dialog.rs
index afa1930..4806bb1 100644
--- a/src/views/dialog.rs
+++ b/src/views/dialog.rs
@@ -331,7 +331,7 @@ impl Dialog {
         let width = self.buttons
             .iter()
             .map(|button| button.button.size.x)
-            .fold(0, |a, b| a + b)
+            .sum::<usize>()
             + self.buttons.len().saturating_sub(1);
         let overhead = self.padding + self.borders;
         if printer.size.x < overhead.horizontal() {
diff --git a/src/views/edit_view.rs b/src/views/edit_view.rs
index 8a0783e..524132c 100644
--- a/src/views/edit_view.rs
+++ b/src/views/edit_view.rs
@@ -477,7 +477,7 @@ impl View for EditView {
                             }
                         })
                         .map(|g| g.len())
-                        .fold(0, |a, b| a + b);
+                        .sum();
 
                     let content = &content[..display_bytes];
                     let width = content.width();
diff --git a/src/views/text_view.rs b/src/views/text_view.rs
index 5f2a62b..e0f3370 100644
--- a/src/views/text_view.rs
+++ b/src/views/text_view.rs
@@ -117,9 +117,9 @@ impl TextContent {
     }
 }
 
-/// Internel representation of the content for a TextView.
+/// Internel representation of the content for a `TextView`.
 ///
-/// This is mostly just a StyledString.
+/// This is mostly just a `StyledString`.
 ///
 /// Can be shared (through a `Arc<Mutex>`).
 struct TextContentInner {
@@ -463,7 +463,7 @@ impl View for TextView {
 
                 for span in row.resolve(&content.content) {
                     printer.with_style(*span.attr, |printer| {
-                        printer.print((x, 0), &span.content);
+                        printer.print((x, 0), span.content);
                         x += span.content.width();
                     });
                 }