fix(lint): apply clippy suggestions

.clippy.toml

@@ -1 +0,0 @@
-msrv = "1.56.1"

systeroid-tui/src/command.rs

@@ -3,7 +3,7 @@ use std::str::FromStr;
 use termion::event::Key;
 
 /// Possible application commands.
-#[derive(Debug, PartialEq)]
+#[derive(Debug, PartialEq, Eq)]
 pub enum Command {
     /// Show help.
     Help,

systeroid-tui/src/options.rs

@@ -5,7 +5,7 @@ macro_rules! generate_option {
      $($variant: ident => $str_repr: expr,)+
     ) => {
         /// Available options.
-        #[derive(Clone, Copy, Debug, PartialEq)]
+        #[derive(Clone, Copy, Debug, PartialEq, Eq)]
         pub enum $name {
             $(
                 /// Option.

systeroid/src/app.rs

@@ -172,7 +172,8 @@ impl<'a, Output: Write> App<'a, Output> {
     /// Processes the parameters in the given file.
     pub fn preload_from_file(&mut self, path: PathBuf) -> Result<()> {
         if path == PathBuf::from("-") {
-            for line in io::stdin().lock().lines() {
+            let lines = io::stdin().lock().lines();
+            for line in lines {
                 if let Err(e) = self.process_parameter(line?, true, false) {
                     println!("{}: {}", env!("CARGO_PKG_NAME"), e);
                 }