Fix scope_opener error for abstract/interface methods

[dereuromark]

Summary

The isFullyTyped() method in DocBlockSniff would crash with:

Undefined array key "scope_opener"

when analyzing abstract methods or interface methods, which don't have a scope_opener token (they end with a semicolon instead of {...}).

Changes

• Check if scope_opener exists before using it
• For abstract/interface methods, search for the semicolon that ends the method declaration instead

Test case

This code would previously crash:

abstract class Foo
{
    abstract public function bar(): void;
}

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