Fixed the params in ChoiceType methods

reference/forms/types/choice.rst

@@ -107,19 +107,19 @@ method::
  new Category('Cat4'),
  ],
  'choices_as_values' => true,
- 'choice_label' => function($category, $key, $index) {
+ 'choice_label' => function($category, $key, $value) {
  /** @var Category $category */
  return strtoupper($category->getName());
  },
- 'choice_attr' => function($category, $key, $index) {
+ 'choice_attr' => function($category, $key, $value) {
  return ['class' => 'category_'.strtolower($category->getName())];
  },
 
- 'group_by' => function($category, $key, $index) {
+ 'group_by' => function($category, $key, $value) {
  // randomly assign things into 2 groups
  return rand(0, 1) == 1 ? 'Group A' : 'Group B';
  },
- 'preferred_choices' => function($category, $key, $index) {
+ 'preferred_choices' => function($category, $key, $value) {
  return $category->getName() == 'Cat2' || $category->getName() == 'Cat3';
  },
  ]);

reference/forms/types/options/choice_attr.rst.inc

@@ -23,7 +23,7 @@ If an array, the keys of the ``choices`` array must be used as keys::
  'Maybe' => null,
  ),
  'choices_as_values' => true,
- 'choice_attr' => function($val, $key, $index) {
+ 'choice_attr' => function($category, $key, $value) {
  // adds a class like attending_yes, attending_no, etc
  return ['class' => 'attending_'.strtolower($key)];
  },

reference/forms/types/options/choice_label.rst.inc

@@ -20,7 +20,7 @@ more control::
  'maybe' => null,
  ),
  'choices_as_values' => true,
- 'choice_label' => function ($value, $key, $index) {
+ 'choice_label' => function ($category, $key, $value) {
  if ($value == true) {
  return 'Definitely!';
  }

reference/forms/types/options/group_by.rst.inc

@@ -26,7 +26,7 @@ Take the following example::
  '1 month' => new \DateTime('+1 month'),
  ),
  'choices_as_values' => true,
- 'group_by' => function($value, $key, $index) {
+ 'group_by' => function($vategory, $key, $value) {
  if ($value <= new \DateTime('+3 days')) {
  return 'Soon';
  } else {