[Form] Fixed ChoiceType trim option

Author: HeahDude

reference/forms/types/choice.rst

@@ -30,6 +30,7 @@ To use this field, you must specify *either* ``choices`` or ``choice_loader`` op
 | Overridden  | - `compound`_                                                                |
 | options     | - `empty_data`_                                                              |
 |             | - `error_bubbling`_                                                          |
+|             | - `trim`_                                                                    |
 +-------------+------------------------------------------------------------------------------+
 | Inherited   | - `attr`_                                                                    |
 | options     | - `by_reference`_                                                            |
@@ -106,7 +107,7 @@ method::
         'choice_attr' => function($category, $key, $index) {
             return ['class' => 'category_'.strtolower($category->getName())];
         },
-        
+
         'group_by' => function($category, $key, $index) {
             // randomly assign things into 2 groups
             return rand(0, 1) == 1 ? 'Group A' : 'Group B';
@@ -323,6 +324,14 @@ error_bubbling
 Set that error on this field must be attached to the field instead of
 the parent field (the form in most cases).
 
+trim
+~~~~
+
+**type**: ``boolean`` **default**: ``false``
+
+The trim is disabled by default for choices values.
+The reason is that a value must match a set of predefined one.
+
 Inherited Options
 -----------------
 

reference/forms/types/country.rst

@@ -33,6 +33,7 @@ you should just use the ``choice`` type directly.
 |             | - `multiple`_                                                         |
 |             | - `placeholder`_                                                      |
 |             | - `preferred_choices`_                                                |
+|             | - `trim`_                                                             |
 |             |                                                                       |
 |             | from the :doc:`form </reference/forms/types/form>` type               |
 |             |                                                                       |

reference/forms/types/currency.rst

@@ -26,6 +26,7 @@ you should just use the ``choice`` type directly.
 |             | - `multiple`_                                                          |
 |             | - `placeholder`_                                                       |
 |             | - `preferred_choices`_                                                 |
+|             | - `trim`_                                                              |
 |             |                                                                        |
 |             | from the :doc:`form </reference/forms/types/form>` type                |
 |             |                                                                        |

reference/forms/types/entity.rst

@@ -32,6 +32,7 @@ objects from the database.
 |             | - `placeholder`_                                                 |
 |             | - `preferred_choices`_                                           |
 |             | - `translation_domain`_                                          |
+|             | - `trim`_                                                        |
 |             |                                                                  |
 |             | from the :doc:`form </reference/forms/types/form>` type:         |
 |             |                                                                  |

reference/forms/types/language.rst

@@ -35,6 +35,7 @@ you should just use the ``choice`` type directly.
 |             | - `multiple`_                                                          |
 |             | - `placeholder`_                                                       |
 |             | - `preferred_choices`_                                                 |
+|             | - `trim`_                                                              |
 |             |                                                                        |
 |             | from the :doc:`form </reference/forms/types/form>` type                |
 |             |                                                                        |

reference/forms/types/locale.rst

@@ -36,6 +36,7 @@ you should just use the ``choice`` type directly.
 |             | - `multiple`_                                                          |
 |             | - `placeholder`_                                                       |
 |             | - `preferred_choices`_                                                 |
+|             | - `trim`_                                                              |
 |             |                                                                        |
 |             | from the :doc:`form </reference/forms/types/form>` type                |
 |             |                                                                        |

reference/forms/types/timezone.rst

@@ -27,6 +27,7 @@ you should just use the ``choice`` type directly.
 |             | - `multiple`_                                                          |
 |             | - `placeholder`_                                                       |
 |             | - `preferred_choices`_                                                 |
+|             | - `trim`_                                                              |
 |             |                                                                        |
 |             | from the :doc:`form </reference/forms/types/form>` type                |
 |             |                                                                        |