style: run rustfmt and clippy

src/backend/crossterm.rs

@@ -122,7 +122,7 @@ impl From<Modifier> for Option<crossterm::Attribute> {
             Modifier::Invert => Some(crossterm::Attribute::Reverse),
             Modifier::Italic => Some(crossterm::Attribute::Italic),
             Modifier::Underline => Some(crossterm::Attribute::Underlined),
-            _ => None
+            _ => None,
         }
     }
 }

src/backend/mod.rs

@@ -16,7 +16,7 @@ pub use self::termion::{AlternateScreenBackend, MouseBackend, RawBackend, Termio
 #[cfg(feature = "crossterm")]
 mod crossterm;
 #[cfg(feature = "crossterm")]
-pub use self::crossterm::{CrosstermBackend};
+pub use self::crossterm::CrosstermBackend;
 
 pub trait Backend {
     fn draw<'a, I>(&mut self, content: I) -> Result<(), io::Error>

src/widgets/list.rs

@@ -247,7 +247,7 @@ impl<'b> Widget for SelectableList<'b> {
                         Item::StyledData(format!("{} {}", blank_symbol, item), &self.style)
                     }
                 } else {
-                    Item::StyledData(format!("{}", item), &self.style)
+                    Item::StyledData(item.to_string(), &self.style)
                 }
             })
             .skip(offset as usize);