Some echo fixes

src/main.rs

@@ -41,6 +41,7 @@ fn main(){
                 "echo" => {
                     let args: Vec<&str> = args/*.peekable().peek().map_or("", |x| *x).split(" ")*/.collect();
                     for arg in args {
+                        if arg.contains("$") {
                             match arg {
                                 "$?" => {
                                     print!("{}", status);
@@ -55,11 +56,15 @@ fn main(){
                                     print!("{}", home_dir);
                                 },
                                 arg => {
-                                print!("{}", arg);
-                            },
+                                    print!("\n");            
+                                }
                             }
                             print!(" ");
+                        } else {
+                            print!("{} ", arg);
                         }
+                    }
+                    print!(" ");
                     stdout().flush().unwrap();
                     println!();
                 },