Some plugins hook into Post after save to set custom fields and save again.
For example: https://github.com/discourse/discourse-category-experts/blob/main/lib/category_experts/post_handler.rb#L27
Problem is that in case like that `raw_changed?` is false but all callback are triggered. `extracted_polls` is class atribute therefore that should be reset with each attempt.
That was causing an error:
```
#<ActiveRecord::RecordNotUnique: PG::UniqueViolation: ERROR: duplicate key value violates unique constraint
"index_polls_on_post_id_and_name" DETAIL: Key (post_id, name)=(8967, poll) already exists.
```
Over the years we accrued many spelling mistakes in the code base.
This PR attempts to fix spelling mistakes and typos in all areas of the code that are extremely safe to change
- comments
- test descriptions
- other low risk areas
This required properly plumbing the guardian into the serializer.
Notably, the default state in the client was not changed - if you haven't voted in
the poll, you need to click the button to view the results instead of the results
being immediately visible on page load.
Implements https://meta.discourse.org/t/-/138108
The bug was mentioned here: https://meta.discourse.org/t/poll-name/136436
I added specs to cover existing behaviour and refactored can_see_results method.
Guard condition should apply only if the poll result setting is set to `staff_only`.
In other cases, user can see results when the poll result setting is set to `always` or user voted or poll is closed.
