Format RawBytes debug as hex string rather than array of decimals

[anorth]

The derived representation of a list of decimals is very unhelpful when debugging, e.g. CBOR-encoded values. The hex string will at least be usable in an CBOR inspector, and I think usually not less useful for cases when the bytes are representing something else (tho since this is the CBOR library, that'll be uncommon).

FYI @ZenGround0 when debugging actors.

[Stebalien]

Yeah, this is much more usable.

[anorth]

I'm having trouble landing this due to:

error: unused import: `crate::RawBytes`
   --> ipld/encoding/src/cbor.rs:102:9
    |
102 |     use crate::RawBytes;
    |         ^^^^^^^^^^^^^^^

My local environment

active toolchain
----------------

nightly-2022-05-09-x86_64-apple-darwin (overridden by '/Users/me/plabs/filecoin-project/ref-fvm/rust-toolchain')
rustc 1.62.0-nightly (cb1219871 2022-05-08)

replicates this warning, but if I remove the import then build fails with failed to resolve: use of undeclared type RawBytes` at the obvious places, and a recommendation to import it.

My IDE (1.63) also requires the import.

This may be related to the discussion in filecoin-project/builtin-actors#660, but I can't see how to straightforwardly apply the same technique here. @mriise can you help?

[mriise]

yeah! its a pretty simple fix :)

[mriise]

Suggested change

	mod test {
	#[cfg(test)]
	mod test {

[anorth]

Thanks 🤦

[codecov-commenter]

Codecov Report

Merging #883 (4dbe9df) into master (d24b86f) will increase coverage by 0.06%.
The diff coverage is 93.75%.

@@            Coverage Diff             @@
##           master     #883      +/-   ##
==========================================
+ Coverage   52.01%   52.08%   +0.06%     
==========================================
  Files         124      124              
  Lines       10191    10218      +27     
==========================================
+ Hits         5301     5322      +21     
- Misses       4890     4896       +6     

Impacted Files	Coverage Δ
ipld/encoding/src/cbor.rs	40.67% <93.75%> (+31.30%)	⬆️