ast: Location Text attribute wrong for multivalue rules with generated body

[anderseknert]

package system.log
	
import rego.v1
	
mask contains "foo"

Parsing this policy and inspecting the Text attribute of the mask rule's Location, one would expect to see mask contains "foo", as any other type of rule would work. Multivalue rules with generated bodies however don't get the full Text, but only the name of the rule, like mask in this case.

This leads to some issues in Regal wrt these rules, as reported by @drewcorlin1

(since the contains keyword is not part of the AST, Regal has to scan the Text attribute in order to know if it's used)

[drewcorlin1]

thanks for the quick fix as usual @anderseknert !