Re: `git diff`/`git apply` can generate/apply ambiguous hunks (ie. in the wrong place) (just like gnu diff/patch)

> With the aforementioned `diffy` patch, the generated diff would actually be
> with a context of 4, to make it unambiguous, so it would've been this:
> ```diff
> --- original
> +++ modified
> @@ -1186,8 +1186,12 @@
>                      self.gctx.shell().warn(msg)?
>                  }
>              }
>          }
> +        if seen_any_warnings {
> +            //use anyhow::bail;
> +            bail!("reasons");
> +        }
>          Ok(())
>      }
> 
>      pub fn emit_lints(&self, pkg: &Package, path: &Path) ->
> CargoResult<()> {
> ```
> this hunk is now unambiguous because it cannot be applied in more than 1
> place in the original file,