[12.x] Fix operator precedence

[daniser]

=== have higher precedence than ??, hence false === true always return false.
Logic is unaffected by this PR, just a small cosmetical fix to avoid confusion.

[browner12]

this does change behavior slightly because we are currently looking for strict equality. this change would allow any truthy value in the config to enable the read only class.

edit: ooh scratch that, I see what you're saying, I think you're right.

[daniser]

this does change behavior slightly because we are currently looking for strict equality. this change would allow any truthy value in the config to enable the read only class.

Okay, I'll fix that, but there never been strict equality before because false === true is false.

[taylorotwell]

Fixed.

[browner12]

to be clear, I think you were right @daniser and IMO this should have been merged.

[daniser]

@browner12 I think Taylor already fixed this by applying grouping.

[browner12]

@daniser as I showed in my comment on Taylor's commit, his commit actually changed behavior while yours did not. I'd resubmit this with that explanation.