fix some clippy warnings

src/bin/bat/app.rs

@@ -169,9 +169,7 @@ impl App {
                 || match self.matches.value_of("color") {
                     Some("always") => true,
                     Some("never") => false,
-                    Some("auto") | _ => {
+                    _ => env::var_os("NO_COLOR").is_none() && self.interactive_output,
-                        env::var_os("NO_COLOR").is_none() && self.interactive_output
-                    }
                 },
             paging_mode,
             term_width: maybe_term_width.unwrap_or(Term::stdout().size().1 as usize),
@@ -226,17 +224,14 @@ impl App {
             style_components,
             syntax_mapping,
             pager: self.matches.value_of("pager"),
-            use_italic_text: match self.matches.value_of("italic-text") {
+            use_italic_text: matches!(self.matches.value_of("italic-text"), Some("always")),
-                Some("always") => true,
-                _ => false,
-            },
             highlighted_lines: self
                 .matches
                 .values_of("highlight-line")
                 .map(|ws| ws.map(LineRange::from).collect())
                 .transpose()?
                 .map(LineRanges::from)
-                .map(|lr| HighlightedLineRanges(lr))
+                .map(HighlightedLineRanges)
                 .unwrap_or_default(),
         })
     }

src/bin/bat/config.rs

@@ -85,7 +85,7 @@ pub fn get_args_from_config_file() -> Result<Vec<OsString>, shell_words::ParseEr
         .ok()
         .map(|content| get_args_from_str(&content))
         .transpose()?
-        .unwrap_or_else(|| vec![]))
+        .unwrap_or_else(Vec::new))
 }
 
 pub fn get_args_from_env_var() -> Option<Result<Vec<OsString>, shell_words::ParseError>> {

src/controller.rs

@@ -161,7 +161,7 @@ impl<'b> Controller<'b> {
         Ok(no_errors)
     }
 
-    fn print_file<'a>(
+    fn print_file(
         &self,
         printer: &mut dyn Printer,
         writer: &mut dyn Write,

src/input.rs

@@ -137,17 +137,12 @@ impl<'a> Input<'a> {
     }
 
     pub fn is_stdin(&self) -> bool {
-        if let InputKind::StdIn = self.kind {
+        matches!(self.kind, InputKind::StdIn)
-            true
-        } else {
-            false
-        }
     }
 
     pub fn with_name(mut self, provided_name: Option<&OsStr>) -> Self {
-        match provided_name {
+        if let Some(name) = provided_name {
-            Some(name) => self.description.name = name.to_string_lossy().to_string(),
+            self.description.name = name.to_string_lossy().to_string()
-            None => {}
         }
 
         self.metadata.user_provided_name = provided_name.map(|n| n.to_owned());

src/output.rs

@@ -150,11 +150,7 @@ impl OutputType {
 
     #[cfg(feature = "paging")]
     pub(crate) fn is_pager(&self) -> bool {
-        if let OutputType::Pager(_) = self {
+        matches!(self, OutputType::Pager(_))
-            true
-        } else {
-            false
-        }
     }
 
     #[cfg(not(feature = "paging"))]

src/pretty_printer.rs

@@ -338,7 +338,7 @@ impl<'a> Input<'a> {
 
     /// A new input from bytes.
     pub fn from_bytes(bytes: &'a [u8]) -> Self {
-        Input::from_reader(bytes).into()
+        Input::from_reader(bytes)
     }
 
     /// A new input from STDIN.

src/printer.rs

@@ -311,7 +311,7 @@ impl<'a> Printer for InteractivePrinter<'a> {
             description
                 .kind()
                 .map(|kind| format!("{}: ", kind))
-                .unwrap_or("".into()),
+                .unwrap_or_else(|| "".into()),
             self.colors.filename.paint(description.title()),
             mode
         )?;