```sh
value = dump_variables
```
Returns all script variables in textual form.
None
The script variables.
```sh
one = set 1
two = set 2
values = array 1 2 yes true
numbers = range -5 15
text = dump_variables
found = contains ${text} two
assert found
found = contains ${text} 2
assert found
found = contains ${text} handle
assert found
```