Finally, I took the time to rewrite it from scratch and that helped a lot.

Remaining issues :BR

- Text duplication when there's more than one Info block in a result SolvedBR

- Simple text after a Code block in a Longmessage appears as Code SolvedBR

- Some others combinations of blocks won't work SolvedBR

- In the errors, the Details... should be links SolvedBR

- Only text was taken into account for a block inside a block that's unsupported by Unicorn Solved

- ISO encoding instead of UTF-8 SolvedBR

- Validation by file upload doesn't work (only on qa-dev) Solved