No linting for when clause with ===

[alexr00]

Testing #177738

The linting shows an error for single-equals and for unclosed parentheses, but there's no error for ===.

[ulugbekna]

I should've linked the parser changes issue -- so basically, we now support === as an alias for == because people use === already in existing when clauses (which were broken)

cc @ugurcn4