Description

We quote some validator functions' inputs but not others. We should standardize this.

Desired behavior/Acceptance criteria (returned value, expected error, performance expectations, etc.)

• discuss when keys of validator functions should be quoted; create tasks to execute the plan

Completion checklist

• Before closing this task, review one by one the checklist available here: https://www.mediawiki.org/wiki/Abstract_Wikipedia_team/Definition_of_Done#Back-end_Task/Bug_completion_checklist