Fix a formatting bug in rusti

Author: alexcrichton

src/librusti/program.rs

@@ -107,7 +107,7 @@ impl Program {
         match *to_print {
             Some(ref s) => {
                 code.push_str(*s);
-                code.push_char('\n');
+                code.push_str(";\n");
             }
             None => {}
         }

src/librusti/rusti.rs

@@ -648,6 +648,11 @@ mod tests {
             fn f() {}
             f()
         ");
+
+        debug!("simultaneous definitions + expressions are allowed");
+        run_program("
+            let a = 3; a as u8
+        ");
     }
 
     #[test]