Fix scan html

[philippe-levan]

The "html statement" syntax was not scanned. (no error if endhtml was missing and the template generation was blocked).

Changes

• Fixed: html/endhtml scanning

Checklist

• [x] If code changed were made, they have been tested.
• [ ] This pull request fixes an issue.
• [ ] This pull request adds a feature.
• [x] The code has been tested.