Hello, I'm using go-git as the main lifter for a little static html repository viewer.
git-to-html
Please pardon my Go code 😞

As part of the flow, I am replicating the unified encoder's functionality so that I can more easily access the colors used for the patch rendering:
views/diff.go
which you'll find looks almost the exact same as go-git's unified encoder plumbing/format/diff/unified_encoder.go

However, when I render the patch using the hunks generator, the context doesn't show the parent function like I expect from git show
For example, running my executable on the git-to-html repo, the output for commit 29108ca75afaab1d058205ebdbfda7a3f656adc1 shows

diff --git a/views/views.go b/views/views.go
index 8dc85f2..5c957ac 100644
--- a/views/views.go
+++ b/views/views.go
@@ -75,7 +75,8 @@ 	if err != nil {

Whereas git show provides

git show 29108ca75afaab1d058205ebdbfda7a3f656adc1
[---elided---]
diff --git a/views/views.go b/views/views.go
index 8dc85f2..5c957ac 100644
--- a/views/views.go
+++ b/views/views.go
@@ -75,7 +75,8 @@ func WriteCommits(repository *git.Repository, repositoryName string, baseDir str

I believe that the hunk's ctxPrefix is somehow wrong here.

Is this the standard function of patches / hunks in go-git, or am I misusing it?

If I am misusing it, can someone point me to somewhere (possibly an example) which shows the correct inputs to get the correct context for this rendering?