Impl Format for all Cows

[mattico]

No description provided.

[mattico]

Is that failure spurious? Can't understand why it would print out of order.

[jonas-schievink]

You're running into #452, it's hiding the actual error:

error[E0433]: failed to resolve: use of undeclared type `Cow`
  --> qemu/src/bin/alloc.rs:40:38
   |
40 |     defmt::info!("Cow<[u32]>: {=?}", Cow::Borrowed(&[1, 2, 3, 4]));
   |                                      ^^^ not found in this scope

[jonas-schievink]

You can test this locally via cd firmware/qemu && cargo rb alloc --features alloc

[Urhengulas]

Thank you @mattico!

bors r+

[bors]

Build succeeded:

• ci