Interactive: fix contextOfPath for Template

[dos65]

Without this fix, in case if input path: List[Tree] starts from Template.constr tree contextOfPath ignores parent trees and returns non-completed Context value.

[odersky]

Logically, I'd expect to use outer if constr contains nested and ctx if parents or self contains nested. I might be wrong, but it's worth trying.

[bishabosha]

Hi @dos65, will you be able to try out the change?

[dos65]

@bishabosha yes - will change it. Sorry, I forgot about this PR.

[dos65]

Logically, I'd expect to use outer if constr contains nested and ctx if parents or self contains nested. I might be wrong, but it's worth trying.

@odersky
I checked it one more time. For constr/parents/self it should return outer. I added completion tests cases that is fixed by this change.

[dos65]

@odersky I rebased commit. Could we merge it?

Requested changes were addressed