OR operator not working with task context define

```
$ task --version
3.4.1
```

Following example from:
https://taskwarrior.org/docs/context/

```
$ task context define work +work or +freelance

Are you sure you want to add 'context.work.read' with a value of '+work or +freelance'? (yes/no) yes

The filter '+work or +freelance' is not a valid modification string, because it contains contains the 'OR' operator.
As such, value for the write context cannot be set (context will not apply on task add / task log).

Please use 'task config context.work.write ' to set default attribute values for new tasks in this context manually.

Context 'work' defined (read only). Use 'task context work' to activate.
```
-------------------------------------------------------------------------------------

```
$ task context

Name Type Definition Active
learning read pro:PGPAIML no
write pro:PGPAIML no
personal read project:PERSONAL no
write project:PERSONAL no
training read project:TRAINING yes
write project:TRAINING yes
work read +work or +freelance no
write no

Use 'task context none' to unset the current context.
```