classes: remove patterns

1-js/09-classes/06-instanceof/1-strange-instanceof/solution.md

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+Yeah, looks strange indeed.
+
+But `instanceof` does not care about the function, but rather about its `prototype`, that it matches against the prototype chain.
+
+And here `a.__proto__ == B.prototype`, so `instanceof` returns `true`.
+
+So, by the logic of `instanceof`, the `prototype` actually defines the type, not the constructor function.