Merge #49

49: Improve textual notation of Call targets. r=ptersilie a=vext01

The textual notation for a Call target is kind of weird.

If there's a known symbol, it looks like this:
```
call operand=sym_name=_ZN50_$LT$T$u20$as$u20$core..convert..Into$LT$U$GT$$GT$4into17hcac79ab93d213ca6E, ret_bb=bb23
```

I think `operand=sym_name=` looks weird.

This change kills `sym_name=` and in case of an unknown target uses `<unknown>` (instead of `unknown`).



Co-authored-by: Edd Barrett <vext01@gmail.com>

ykpack/src/types.rs

@@ -354,8 +354,8 @@ pub enum CallOperand {
 impl Display for CallOperand {
  fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
  match self {
- CallOperand::Fn(sym_name) => write!(f, "sym_name={}", sym_name),
- CallOperand::Unknown => write!(f, "unknown"),
+ CallOperand::Fn(sym_name) => write!(f, "{}", sym_name),
+ CallOperand::Unknown => write!(f, "<unknown>"),
  }
  }
 }