Mark Ingram 16806fc12c

examples: updates factorial to tracing 0.2 & set DEBUG level (#1182) ...

## Motivation

factorial dbg! example doesn't produce any stdout & is referencing tracing 0.1 crate

## Solution

update to path reference & set fmt max level DEBUG:

```
$ cargo run --example factorial
Jan 10 21:17:47.574 DEBUG factorial: n <= 1 value=false
Jan 10 21:17:47.575 DEBUG factorial: n <= 1 value=false
...
```

2021-01-27 14:05:21 -08:00

..

factorial.rs

examples: updates factorial to tracing 0.2 & set DEBUG level (#1182)

2021-01-27 14:05:21 -08:00