diff --git a/src/backend/rustbox.rs b/src/backend/rustbox.rs
index e4b36448..921724c5 100644
--- a/src/backend/rustbox.rs
+++ b/src/backend/rustbox.rs
@@ -71,7 +71,7 @@ impl Backend for RustboxBackend {
 }
 
 fn rgb_to_byte(r: u8, g: u8, b: u8) -> u16 {
-    (((r & 255 & 0xC0) + ((g & 255 & 0xE0) >> 2) + ((b & 0xE0) >> 5)) & 0xFF) as u16
+    u16::from((r & 0xC0) + ((g & 0xE0) >> 2) + ((b & 0xE0) >> 5))
 }
 
 impl Into<rustbox::Color> for Color {
diff --git a/src/symbols.rs b/src/symbols.rs
index efaac87a..d9b2bf5c 100644
--- a/src/symbols.rs
+++ b/src/symbols.rs
@@ -1,36 +1,36 @@
 pub mod block {
-    pub const FULL: &'static str = "█";
-    pub const SEVEN_EIGHTHS: &'static str = "▉";
-    pub const THREE_QUATERS: &'static str = "▊";
-    pub const FIVE_EIGHTHS: &'static str = "▋";
-    pub const HALF: &'static str = "▌";
-    pub const THREE_EIGHTHS: &'static str = "▍";
-    pub const ONE_QUATER: &'static str = "▎";
-    pub const ONE_EIGHTH: &'static str = "▏";
+    pub const FULL: &str = "█";
+    pub const SEVEN_EIGHTHS: &str = "▉";
+    pub const THREE_QUATERS: &str = "▊";
+    pub const FIVE_EIGHTHS: &str = "▋";
+    pub const HALF: &str = "▌";
+    pub const THREE_EIGHTHS: &str = "▍";
+    pub const ONE_QUATER: &str = "▎";
+    pub const ONE_EIGHTH: &str = "▏";
 }
 
 pub mod bar {
-    pub const FULL: &'static str = "█";
-    pub const SEVEN_EIGHTHS: &'static str = "▇";
-    pub const THREE_QUATERS: &'static str = "▆";
-    pub const FIVE_EIGHTHS: &'static str = "▅";
-    pub const HALF: &'static str = "▄";
-    pub const THREE_EIGHTHS: &'static str = "▃";
-    pub const ONE_QUATER: &'static str = "▂";
-    pub const ONE_EIGHTH: &'static str = "▁";
+    pub const FULL: &str = "█";
+    pub const SEVEN_EIGHTHS: &str = "▇";
+    pub const THREE_QUATERS: &str = "▆";
+    pub const FIVE_EIGHTHS: &str = "▅";
+    pub const HALF: &str = "▄";
+    pub const THREE_EIGHTHS: &str = "▃";
+    pub const ONE_QUATER: &str = "▂";
+    pub const ONE_EIGHTH: &str = "▁";
 }
 
 pub mod line {
-    pub const TOP_RIGHT: &'static str = "┐";
-    pub const VERTICAL: &'static str = "│";
-    pub const HORIZONTAL: &'static str = "─";
-    pub const TOP_LEFT: &'static str = "┌";
-    pub const BOTTOM_RIGHT: &'static str = "┘";
-    pub const BOTTOM_LEFT: &'static str = "└";
-    pub const VERTICAL_LEFT: &'static str = "┤";
-    pub const VERTICAL_RIGHT: &'static str = "├";
-    pub const HORIZONTAL_DOWN: &'static str = "┬";
-    pub const HORIZONTAL_UP: &'static str = "┴";
+    pub const TOP_RIGHT: &str = "┐";
+    pub const VERTICAL: &str = "│";
+    pub const HORIZONTAL: &str = "─";
+    pub const TOP_LEFT: &str = "┌";
+    pub const BOTTOM_RIGHT: &str = "┘";
+    pub const BOTTOM_LEFT: &str = "└";
+    pub const VERTICAL_LEFT: &str = "┤";
+    pub const VERTICAL_RIGHT: &str = "├";
+    pub const HORIZONTAL_DOWN: &str = "┬";
+    pub const HORIZONTAL_UP: &str = "┴";
 }
 
-pub const DOT: &'static str = "•";
+pub const DOT: &str = "•";
diff --git a/src/widgets/canvas/world.rs b/src/widgets/canvas/world.rs
index e382eea9..775486aa 100644
--- a/src/widgets/canvas/world.rs
+++ b/src/widgets/canvas/world.rs
@@ -1,4 +1,5 @@
-/// Source: http://www.gnuplotting.org/plotting-the-world-revisited/
+/// [Source data](http://www.gnuplotting.org/plotting-the-world-revisited)
+
 pub static WORLD_HIGH_RESOLUTION: [(f64, f64); 5125] = [
     (-163.71289567772871, -78.595667413241543),
     (-163.105800951163786, -78.223338718578589),
diff --git a/src/widgets/list.rs b/src/widgets/list.rs
index 463de425..42b9ebb1 100644
--- a/src/widgets/list.rs
+++ b/src/widgets/list.rs
@@ -102,7 +102,7 @@ where
                         &Style::default(),
                     );
                 }
-                Item::StyledData(ref v, ref s) => {
+                Item::StyledData(ref v, s) => {
                     buf.set_stringn(
                         list_area.left(),
                         list_area.top() + i as u16,