Fix lint warnings in examples

examples/repl.rs

@@ -13,7 +13,7 @@ fn print_error(input: &str, err: EvalAltResult) {
         iter::repeat(pad).take(len).collect::<String>()
     }
 
-    let lines: Vec<_> = input.trim().split("\n").collect();
+    let lines: Vec<_> = input.trim().split('\n').collect();
 
     let line_no = if lines.len() > 1 {
         match err.position() {
@@ -161,7 +161,7 @@ fn main() {
                 #[cfg(not(feature = "no_optimize"))]
                 {
                     engine.set_optimization_level(OptimizationLevel::Full);
-                    ast = Some(engine.optimize_ast(&mut scope, ast_u.as_ref().unwrap()));
+                    ast = Some(engine.optimize_ast(&scope, ast_u.as_ref().unwrap()));
                     engine.set_optimization_level(OptimizationLevel::None);
                 }
 
@@ -178,9 +178,9 @@ fn main() {
                     })
             })
         {
-            println!("");
+            println!();
             print_error(&input, err);
-            println!("");
+            println!();
         }
     }
 }

examples/rhai_runner.rs

@@ -10,7 +10,7 @@ fn padding(pad: &str, len: usize) -> String {
 }
 
 fn eprint_error(input: &str, err: EvalAltResult) {
-    fn eprint_line(lines: &Vec<&str>, line: usize, pos: usize, err: &str) {
+    fn eprint_line(lines: &[&str], line: usize, pos: usize, err: &str) {
         let line_no = format!("{}: ", line);
         let pos_text = format!(" (line {}, position {})", line, pos);
 
@@ -23,7 +23,7 @@ fn eprint_error(input: &str, err: EvalAltResult) {
         eprintln!("");
     }
 
-    let lines: Vec<_> = input.split("\n").collect();
+    let lines: Vec<_> = input.split('\n').collect();
 
     // Print error
     match err.position() {
@@ -72,13 +72,10 @@ fn main() {
 
         let mut contents = String::new();
 
-        match f.read_to_string(&mut contents) {
+        if let Err(err) = f.read_to_string(&mut contents) {
-            Err(err) => {
             eprintln!("Error reading script file: {}\n{}", filename, err);
             exit(1);
         }
-            _ => (),
-        }
 
         if let Err(err) = engine.consume(false, &contents) {
             eprintln!("{}", padding("=", filename.len()));