The reporting user read the documentation as suggesting that this is the "note" syntax:
```
NOTE
Some note text here, in a codeblock.
```
It could be more clear that "NOTE", "WARNING" and "IMPORTANT" are not part of the code block syntax, and are separate block elements.
---
//Original Report//
When trying to set a code block as a note, warning or important (as specified [[ /book/phabricator/article/remarkup/#layout | here ]]) the keyword isn't parsed/recognised. For example,
```
warning
This won't be set as a warning
```
Counterexample will work on the other hand:
```
counterexample
This is a counter example
```