Commits on Apr 21, 2015

1. Change a few error messages to give code suggestions …

   PR rust-lang#24242 added the ability to the compiler to directly give suggestions about
   how to modify code to fix an error. The new errors look like this:
   
       foobar.rs:5:12: 5:25 error: expected a path on the left-hand side of `+`,
                                   not `&'static Copy` [E0178]
       foobar.rs:5     let x: &'static Copy + 'static;
                              ^~~~~~~~~~~~~
       foobar.rs:5:12: 5:35 help: try adding parentheses (per RFC 438):
       foobar.rs:      let x: &'static (Copy + 'static);
   
       foobar.rs:2:13: 2:23 error: cast to unsized type: `&_` as `core::marker::Copy`
       foobar.rs:2     let x = &1 as Copy;
                               ^~~~~~~~~~
       foobar.rs:2:19: 2:23 help: try casting to a reference instead:
       foobar.rs:      let x = &1 as &Copy;
   
       foobar.rs:7:24: 7:25 error: expected expression, found `;`
       foobar.rs:7     let x = box (1 + 1);
                                          ^
       foobar.rs:7:13: 7:16 help: try using `box()` instead:
       foobar.rs:      let x = box() (1 + 1);
   
   This also modifies compiletest to give the ability to directly test suggestions
   given by error messages.

   

   ftxqxd committed Apr 21, 2015
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