</div>
```
-Title should be `Tip:` for a tip and `Note:` for a note.
+Replace the `tip` class with `warn` for a warning block, and with `err`
+for an error message block (when JavaScript is needed but is disabled, etc.).
+Title should be `Tip:` for a tip, `Note:` for a note, `Warning:` for a
+warning, and `Error:` for an error.
#### External links
(good: `include/trace/events`, bad: `include/trace/events/`).
* Keep the text as impersonal as possible (minimize the use of
_I_, _we_, _us_, etc.), except for user guides/tutorials where
- _we_ have an ongoing example.
+ _we_ have an ongoing example with _you_.
+ * Minimize the use of the future tense (_will_).
+ * Do not use Latin abbreviations (_e.g._, _i.e._, _etc._).
Committing