doc examples errors

[jordens]

e.g.

https://github.com/rust-embedded/heapless/blob/cbd406eab8eaba37206cd9f4924b1e4bdf314d5d/src/vec.rs#L19C1-L20C1

push() is fallible. The Result should be used, even if it is just .ok()ed.

[newAM]

Do you know of an automated way to check for this? I can fix that specific example, but there are probably more in the codebase.

[jordens]

Not aware of anything other than what you already found: #416 (comment)

[jordens]

#441