[Feature Request] Diff "function" header

[agrath]

Unsure if this is possible, but many languages (most?) have their code broken into functions. When viewing a diff, it would be really useful if the diff viewer could peek the function for each diff block, for example, if some lines were changed, you usually see a few lines before, but it would be super useful for quick commit reviews if I could see which function those changes were in

[DanPristupov]

it would be really useful if the diff viewer could peek the function for each diff block, for example

This feature is part of git. Chunk header shows the signature of the parent fuction (if possible).

For example here on the first line: