Process graphviz diagrams.

[jonathanpallant]

Replaces mermaid support (which doesn't work well with reveal.js and RevealMarkdown).

I prefer this over #23 and #22. But you have to re-write your diagrams as Graphviz dot syntax.

[jonathanpallant]

I think we can publish this because anything other than dot process blocks are left exactly as before.

[Hoverbear]

Can't give a very comprehensive review here but everything appears as I'd expect and the checks pass.

[jonathanpallant]

Actually, I should add a test containing a dot diagram.

[tshepang]

running cargo test fails locally for me...

test build_slides ... FAILED

[jonathanpallant]

What does:

$ diff -r ./tests/reference_out ./tests/data_out

say? Do you have Graphviz installed?

[tshepang]

❯ diff -r ./tests/reference_out ./tests/data_out
diff --color=auto -r ./tests/reference_out/chapter_2.html ./tests/data_out/chapter_2.html
13c13
< <!-- Generated by graphviz version 2.43.0 (0)
---
> <!-- Generated by graphviz version 12.2.0 (20241103.1931)
15c15
< <!-- Title: %3 Pages: 1 -->
---
> <!-- Pages: 1 -->
19,20c19
< <title>%3</title>
< <polygon fill="white" stroke="transparent" points="-4,4 -4,-41 58,-41 58,4 -4,4"/>
---
> <polygon fill="white" stroke="none" points="-4,4 -4,-41 58,-41 58,4 -4,4"/>
25c24
< <text text-anchor="middle" x="27" y="-14.8" font-family="Times,serif" font-size="14.00">X</text>
---
> <text text-anchor="middle" x="26.88" y="-13.45" font-family="Times,serif" font-size="14.00">X</text>

yeah, it's installed... version 12.2.0

[jonathanpallant]

That diff seems fine. I see the same.