symfony
diff --git a/‎reference/forms/types/choice.rst
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+4-5Lines changed: 4 additions & 5 deletions b/‎reference/forms/types/choice.rst
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+4-5Lines changed: 4 additions & 5 deletions
diff --git a/‎reference/forms/types/options/choice_attr.rst.inc
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+1-1Lines changed: 1 addition & 1 deletion b/‎reference/forms/types/options/choice_attr.rst.inc
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diff --git a/‎reference/forms/types/options/choice_label.rst.inc
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+3-2Lines changed: 3 additions & 2 deletions b/‎reference/forms/types/options/choice_label.rst.inc
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diff --git a/‎reference/forms/types/options/group_by.rst.inc
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+2-2Lines changed: 2 additions & 2 deletions
@@ -107,19 +107,18 @@ 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';
         },
     ]);
 
@@ -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, $index) {
+        'choice_attr' => function($choiceValue, $key, $value) {
             // adds a class like attending_yes, attending_no, etc
             return ['class' => 'attending_'.strtolower($key)];
         },
 
@@ -20,10 +20,11 @@ more control::
             'maybe' => null,
         ),
         'choices_as_values' => true,
-        'choice_label' => function ($value, $key, $index) {
-            if ($value == true) {
+        'choice_label' => function ($choiceValue, $key, $value) {
+            if (true === $choiceValue) {
                 return 'Definitely!';
             }
+
             return strtoupper($key);
 
             // or if you want to translate some key
 
@@ -26,8 +26,8 @@ Take the following example::
             '1 month' => new \DateTime('+1 month'),
         ),
         'choices_as_values' => true,
-        'group_by' => function($value, $key, $index) {
-            if ($value <= new \DateTime('+3 days')) {
+        'group_by' => function($choiceValue, $key, $value) {
+            if ($choiceValue <= new \DateTime('+3 days')) {
                 return 'Soon';
             } else {
                 return 'Later';