* format: allow ignoreing source locations
* cmd/eval: format disregarding source locations for partial result
Before, we'd see this output:
```
$ opa eval -p -fsource 'time.clock(input.x)==time.clock(input.y)'
# Query 1
time.clock(time.clock(input.x), input.y)
```
Now, we get the proper answer: `time.clock(input.y, time.clock(input.x))`.
Note that it's a _display_ issue; the JSON output of PE has not been affected.
Fixes#4609.
Signed-off-by: Stephan Renatus <stephan.renatus@gmail.com>
Stephan Renatus
8dc77efc73