Fixed some inspection issues

src/Form/Filters/Constraints/DateTimeConstraintType.php

@@ -38,7 +38,7 @@ class DateTimeConstraintType extends AbstractType
         $resolver->setDefaults([
             'compound' => true,
             'data_class' => DateTimeConstraint::class,
-            'text_suffix' => '', // An suffix which is attached as text-append to the input group. This can for example be used for units
+            'text_suffix' => '', // A suffix which is attached as text-append to the input group. This can for example be used for units
 
             'value1_options' => [], // Options for the first value input
             'value2_options' => [], // Options for the second value input

src/Form/Type/RichTextEditorType.php

@@ -55,7 +55,7 @@ class RichTextEditorType extends AbstractType
     {
         $tmp = [];
 
-        //Set novalidate attribute or we will get problems that form can not be submitted as textarea is not focusable
+        //Set novalidate attribute, or we will get problems that form can not be submitted as textarea is not focusable
         $tmp['novalidate'] = 'novalidate';
 
         $tmp['data-mode'] = $options['mode'];

src/Form/Type/StructuralEntityType.php

@@ -109,12 +109,7 @@ class StructuralEntityType extends AbstractType
                     return null;
                 }
 
-                if ($element->getID() === null) {
-                    //Must be the same as the separator in the choice_loader, otherwise this will not work!
-                    return $element->getFullPath('->');
-                }
-
-                return $element->getID();
+                return (string) $element->getID() ?? $element->getFullPath('->');
             }, //Use the element id as option value and for comparing items
             'choice_loader' => function (Options $options) {
                 return new StructuralEntityChoiceLoader($options, $this->builder, $this->em);

src/Form/Type/TriStateCheckboxType.php

@@ -70,7 +70,7 @@ final class TriStateCheckboxType extends AbstractType implements DataTransformer
      *
      * 1. Model transformers which normalize the model data.
      *    This is mainly useful when the same form type (the same configuration)
-     *    has to handle different kind of underlying data, e.g The DateType can
+     *    has to handle different kind of underlying data, e.g. The DateType can
      *    deal with strings or \DateTime objects as input.
      *
      * 2. View transformers which adapt the normalized data to the view format.