Hotfix v0.2.1

[jngls]

This fixes the infinite trait resolution compile issue caused by things like:

#[derive(SyntaxFmtDerive)]
#[syntax(bound = DummyBound)]
struct MutualRecursiveA<'a> {
    b: MutualRecursiveB<'a>,
    _marker: PhantomData<&'a i32>,
}

#[derive(SyntaxFmtDerive)]
#[syntax(bound = DummyBound)]
struct MutualRecursiveB<'a> {
    a: Vec<MutualRecursiveA<'a>>,
    _marker: PhantomData<&'a i32>,
}

I was incorrectly overspecifying bounds. This has been commented out and will be removed fully in a future version if it's definitely not needed.

Summary

• Removed overspecified where bounds added by proc macro
• Add comprehensive example
• Bumped version to 0.2.1
• Minor doc tweaks

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This discussion was created from the release Hotfix v0.2.1.