Only show interesting array intersections

Author: muglug

src/Psalm/Type/Atomic/ObjectLike.php

@@ -123,6 +123,8 @@ function ($name, Union $type): string {
                 implode(', ', $property_strings) .
                 '}'
                 . ($this->previous_value_type
+                    && (!$this->previous_value_type->isMixed()
+                        || ($this->previous_key_type && !$this->previous_key_type->isArrayKey()))
                     ? '<' . ($this->previous_key_type ? $this->previous_key_type->getId() . ', ' : '')
                         . $this->previous_value_type->getId() . '>'
                     : '');