@startuml or @startgantt stops toc generator from functioning.

[GeoffMurray]

I am using plantuml code blocks, like so...

```plantuml
@startuml
start
:Init Phase;
:Transfer Phase;
note right
long running activity,
process requires signal to proceed
end note
:Termination Phase;
stop
@enduml
```

Or, this:

```plantuml
@startgantt
skinparam monochrome true
[Task1] on {Alice} lasts 8 days
then [Task2] on {Bob} lasts 4 days at 50%
then [Task3] on {Carol} lasts 2 days at 25%
@endgantt
```

Either of these stop the TOC generator from functioning. In the first example, I can workaround by removing the @startuml and @enduml markers. However, in the second example, I cannot, because that's a critical part of the syntax.

It's as though the TOC generator is not really treating the code block as fully code. It seems something about the "@" syntax is throwing off the processing.

I'm not sure if there is any sort of error log I might be able to find to help narrow down the problem.

[vamsi-juvvi]

I have been doing PlantUml heavily and have noticed this as well. For a while I switched to using VSCode's outline feature as a replacement but that was not satisfying. Decided to try my hand at actually debugging this issue: code is straightforward and well structured so was fairly quick to locate the issue.

Will send a PR for the simplest, clean fix I can come up with in a bit.

[vamsi-juvvi]

@huntertran Created PR: #62. Pls let me know if you want me to change anything.

[huntertran]

Thank @vamsi-juvvi for the pull request
The fix was published in 3.0.13