solve phpstan issues

Author: ashnazg

src/phpDocumentor/GraphViz/Attribute.php

@@ -116,7 +116,7 @@ public function isValueInHtml()
     {
         $value = $this->getValue();
 
-        return (bool)(isset($value[0]) && ($value[0] == '<'));
+        return (isset($value[0]) && ($value[0] == '<'));
     }
 
     /**

src/phpDocumentor/GraphViz/Edge.php

@@ -28,7 +28,7 @@ class Edge
     /** @var \phpDocumentor\GraphViz\Node Node where to to link */
     protected $to = null;
 
-    /** @var \phpDocumentor\GraphViz\Attribute List of attributes for this edge */
+    /** @var \phpDocumentor\GraphViz\Attribute[] List of attributes for this edge */
     protected $attributes = array();
 
     /**
@@ -93,7 +93,7 @@ public function getTo()
      *  setX or getX.
      * @param mixed[] $arguments Arguments for the setter, only 1 is expected: value
      *
-     * @return \phpDocumentor\GraphViz\Attribute[]|\phpDocumentor\GraphViz\Edge|null
+     * @return \phpDocumentor\GraphViz\Attribute|\phpDocumentor\GraphViz\Edge|null
      */
     function __call($name, $arguments)
     {

src/phpDocumentor/GraphViz/Graph.php

@@ -187,7 +187,7 @@ public function isStrict()
      * @param string  $name      Name of the method including get/set
      * @param mixed[] $arguments The arguments, should be 1: the value
      *
-     * @return \phpDocumentor\GraphViz\Attribute[]|\phpDocumentor\GraphViz\Graph|null
+     * @return \phpDocumentor\GraphViz\Attribute|\phpDocumentor\GraphViz\Graph|null
      */
     function __call($name, $arguments)
     {
@@ -272,7 +272,7 @@ public function setNode(Node $node)
      *
      * @param string $name Name of the node to find.
      *
-     * @return \phpDocumentor\GraphViz\Node
+     * @return \phpDocumentor\GraphViz\Node|null
      */
     public function findNode($name)
     {
@@ -314,7 +314,7 @@ function __set($name, $value)
      *
      * @see \phpDocumentor\GraphViz\Graph::setNode()
      *
-     * @return \phpDocumentor\GraphViz\Node
+     * @return \phpDocumentor\GraphViz\Node|null
      */
     function __get($name)
     {

src/phpDocumentor/GraphViz/Node.php

@@ -98,7 +98,7 @@ public function getName()
      * @param string  $name      Method name; either getX or setX is expected.
      * @param mixed[] $arguments List of arguments; only 1 is expected for setX.
      *
-     * @return \phpDocumentor\GraphViz\Attribute[]|\phpDocumentor\GraphViz\Node|null
+     * @return \phpDocumentor\GraphViz\Attribute|\phpDocumentor\GraphViz\Node|null
      */
     function __call($name, $arguments)
     {