clippy lints

src/db.rs

@@ -90,11 +90,11 @@ pub fn start(program_path: Option<String>) {
     }
 }
 
-fn read_and_run<'a>(path: &str) {
+fn read_and_run(path: &str) {
     let path = Path::new(path);
 
     match std::fs::read_to_string(path) {
-        Ok(content) => match stmt::parse(&content, filename(&path)) {
+        Ok(content) => match stmt::parse(&content, filename(path)) {
             Ok(stmts) => run(stmts),
             Err(why) => eprintln!("error while parsing: {}.", why),
         },

src/stmt.rs

@@ -223,8 +223,8 @@ fn parse_line(line: &str) -> Result<IrStmt, String> {
         }
         "STOP" => IrStmt::Stop,
         stmt => {
-            if stmt.starts_with('.') {
+            if let Some(stripped) = stmt.strip_prefix('.') {
-                IrStmt::Label(&stmt[1..])
+                IrStmt::Label(stripped)
             } else if stmt.starts_with('#') {
                 IrStmt::None
             } else {