Impl PartialEq<str> for Tendril<ASCII> and Tendril<UTF8>

[nicoburns]

• Fixes StrTendril should implement PartialEq<str> tendril#30

[simonwuelker]

Feels a bit weird to compare tendril bytes without knowing what format they are. This will yield unexpected results when comparing str with tendrils using non-utf8 encodings.

Maybe we could only impl this for the formats that come with tendril out of the box(https://docs.rs/tendril/latest/tendril/fmt/index.html#structs) ? Those that are known to be subsets of utf8.

[nicoburns]

Feels a bit weird to compare tendril bytes without knowing what format they are. This will yield unexpected results when comparing str with tendrils using non-utf8 encodings.

Maybe we could only impl this for the formats that come with tendril out of the box(https://docs.rs/tendril/latest/tendril/fmt/index.html#structs) ? Those that are known to be subsets of utf8.

I'm inclined to agree with this. I've restricted the impl to Tendril<ASCII> and Tendril<UTF8>.

I think one could argue for an impl for Tendril<WTF8> too. And a comparision to &[u8] for Bytes. But I suspect the UTF8 one is the most useful, and we can always add more later.