c143267901
Make # pretty print format easier to discover
# Rationale:
I use (cargo cult?) three formats in rust: `{}`, debug `{:?}`, and pretty-print debug `{:#?}`. I discovered `{:#?}` in some blog post or guide when I started working in Rust. While `#` is documented I think it is hard to discover. So taking the good advice of ```@carols10cents``` I am trying to improve the docs with a PR
As a reminder "pretty print" means that where `{:?}` will print something like
```
foo: { b1: 1, b2: 2}
```
`{:#?}` will prints something like
```
foo {
b1: 1
b2: 3
}
```
# Changes
Add an example to `fmt` to try and make it easier to discover `#`
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| src | ||
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| Cargo.toml | ||