minor #12884 [Console] fixes some typos and phpdoc. (hhamon)

This PR was merged into the 2.5 branch.

Discussion
----------

[Console] fixes some typos and phpdoc.

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | ~
| License       | MIT
| Doc PR        | ~

Commits
-------

86840df [Console] fixes some typos and phpdoc.

src/Symfony/Component/Console/Question/ChoiceQuestion.php

@@ -23,6 +23,13 @@ class ChoiceQuestion extends Question
     private $prompt = ' > ';
     private $errorMessage = 'Value "%s" is invalid';
 
+    /**
+     * Constructor.
+     *
+     * @param string $question The question to ask to the user
+     * @param array  $choices  The list of available choices
+     * @param mixed  $default  The default answer to return
+     */
     public function __construct($question, array $choices, $default = null)
     {
         parent::__construct($question, $default);
@@ -100,6 +107,11 @@ class ChoiceQuestion extends Question
         return $this;
     }
 
+    /**
+     * Returns the default answer validator.
+     *
+     * @return callable
+     */
     private function getDefaultValidator()
     {
         $choices = $this->choices;

src/Symfony/Component/Console/Question/ConfirmationQuestion.php

@@ -18,6 +18,12 @@ namespace Symfony\Component\Console\Question;
  */
 class ConfirmationQuestion extends Question
 {
+    /**
+     * Constructor.
+     *
+     * @param string $question The question to ask to the user
+     * @param bool   $default  The default answer to return, true or false
+     */
     public function __construct($question, $default = true)
     {
         parent::__construct($question, (bool) $default);
@@ -25,6 +31,11 @@ class ConfirmationQuestion extends Question
         $this->setNormalizer($this->getDefaultNormalizer());
     }
 
+    /**
+     * Returns the default answer normalizer.
+     *
+     * @return callable
+     */
     private function getDefaultNormalizer()
     {
         $default = $this->getDefault();

src/Symfony/Component/Console/Question/Question.php

@@ -116,7 +116,7 @@ class Question
     /**
      * Gets values for the autocompleter.
      *
-     * @return null|array|Traversable
+     * @return null|array|\Traversable
      */
     public function getAutocompleterValues()
     {
@@ -126,7 +126,7 @@ class Question
     /**
      * Sets values for the autocompleter.
      *
-     * @param null|array|Traversable $values
+     * @param null|array|\Traversable $values
      *
      * @return Question The current instance
      *
@@ -165,7 +165,7 @@ class Question
     }
 
     /**
-     * Gets the validator for the question
+     * Gets the validator for the question.
      *
      * @return null|callable
      */
@@ -211,9 +211,9 @@ class Question
     /**
      * Sets a normalizer for the response.
      *
-     * The normalizer can ba a callable (a string), a closure or a class implementing __invoke.
+     * The normalizer can be a callable (a string), a closure or a class implementing __invoke.
      *
-     * @param string|Closure $normalizer
+     * @param string|\Closure $normalizer
      *
      * @return Question The current instance
      */
@@ -229,7 +229,7 @@ class Question
      *
      * The normalizer can ba a callable (a string), a closure or a class implementing __invoke.
      *
-     * @return string|Closure
+     * @return string|\Closure
      */
     public function getNormalizer()
     {