Before this fix, e.g., the rule:
```rego
p if { {false} }
```
would be formated to:
```rego
p if {false}
```
which changes the semantics from a rule body containing a single set
(`{false}`) to a rule body containing a single scalar value (`false`).
Signed-off-by: Johan Fylling <johan.dev@fylling.se>
Johan Fylling
6682a18b12