fix clippy warnings from upgrade

Author: jacobmealey

src/expr.rs

@@ -622,15 +622,15 @@ impl PipeLineExpr {
                     let n = match file.read(&mut buffer) {
                         Ok(n) => n,
                         Err(e) => {
-                            println!("{:?}", e);
+                            println!("{e:?}");
                             return 1;
                         }
                     };
                     if n == 0 {
                         break;
                     }
                     if let Err(e) = stdin.write(&buffer[..n]) {
-                        panic!("Error writing to stdin: {}", e);
+                        panic!("Error writing to stdin: {e}");
                     }
                 }
                 drop(stdin);
@@ -724,7 +724,7 @@ impl ExpansionExpr {
                 }
             }
             ExpansionExpr::ParameterError(var, err) => {
-                eprintln!("slush: {}: {}", var, err);
+                eprintln!("slush: {var}: {err}");
                 std::process::exit(1);
             }
             ExpansionExpr::ParameterAssign(var, default) => {

src/main.rs

@@ -28,7 +28,7 @@ fn repl() {
 
     panic::set_hook(Box::new(|panic_info| {
         println!("one or more internal error occurred while running slush.");
-        println!("{}", panic_info);
+        println!("{panic_info}");
         println!("Submit an issue (or a pull request!) here: https://github.com/jacobmealey/slush");
     }));
 

src/parser.rs

@@ -534,8 +534,7 @@ impl Parser {
             self.next_token();
             if self.current_is(ShTokenType::EndOfFile) {
                 return Err(format!(
-                    "Syntax Error: Unexpected end of file, no matching '{:?}'",
-                    right
+                    "Syntax Error: Unexpected end of file, no matching '{right:?}'"
                 ));
             }
             count += if self.current_is(left) {
@@ -558,8 +557,7 @@ impl Parser {
         while !self.try_consume(stop) {
             if self.current_is(ShTokenType::EndOfFile) {
                 return Err(format!(
-                    "Syntax Error: Unexpected end of file, no matching '{:?}'",
-                    stop
+                    "Syntax Error: Unexpected end of file, no matching '{stop:?}'"
                 ));
             }
             ret.push_str(&self.current().lexeme);

src/parser/tokenizer.rs

@@ -109,7 +109,7 @@ pub fn tokens(st: &str) -> Result<Vec<Token>, String> {
             ret.push(it.next().unwrap());
         }
         if it.peek().is_none() {
-            return Err(format!("Couldn't find second '{}'.", token));
+            return Err(format!("Couldn't find second '{token}'."));
         }
         it.next();
         Ok(ret)