Improve descriptions of ArrayHasItemWith and ArrayHasKeyWith

Author: PhrozenByte

src/Constraint/ArrayHasItemWith.php

@@ -61,7 +61,7 @@ public function __construct(int $index, Constraint $constraint)
      */
     public function toString(): string
     {
-        return 'has a value at index ' . $this->index . ' '
+        return 'is an array that has a value at index ' . $this->index . ' '
                 . 'which ' . $this->constraint->toString();
     }
 

src/Constraint/ArrayHasKeyWith.php

@@ -57,7 +57,7 @@ public function __construct($key, Constraint $constraint)
      */
     public function toString(): string
     {
-        return 'has the key ' . $this->exporter()->export($this->key) . ' '
+        return 'is an array that has the key ' . $this->exporter()->export($this->key) . ' '
             . 'whose value ' . $this->constraint->toString();
     }