Minor fixes

Author: windelbouwman

src/main.rs

@@ -10,8 +10,8 @@ extern crate rustpython_vm;
 use clap::{App, Arg};
 use rustpython_parser::parser;
 use rustpython_vm::compile;
-use rustpython_vm::VirtualMachine;
 use rustpython_vm::print_exception;
+use rustpython_vm::VirtualMachine;
 use std::io;
 use std::io::prelude::*;
 use std::path::Path;

vm/src/vm.rs

@@ -975,7 +975,7 @@ mod tests {
         let a = vm.ctx.new_str(String::from("Hello "));
         let b = vm.ctx.new_int(4);
         let res = vm._mul(a, b).unwrap();
-        let value = objstr::get_value(res);
+        let value = objstr::get_value(&res);
         assert_eq!(value, String::from("Hello Hello Hello Hello "))
     }
 }