Merge branch '5.1'

* 5.1:
  Update form_collections.rst
  Fix typo in the docs

Author: javiereguiluz

form/form_collections.rst

@@ -226,7 +226,7 @@ it will receive an *unknown* number of tags. Otherwise, you'll see a
 
     public function buildForm(FormBuilderInterface $builder, array $options)
     {
-        $builder->add('description');
+        // ...
 
         $builder->add('tags', CollectionType::class, [
             'entry_type' => TagType::class,

testing.rst

@@ -213,7 +213,7 @@ Now you can use CSS selectors with the crawler. To assert that the phrase
     $this->assertSelectorTextContains('html h1.title', 'Hello World');
 
 This assertion checks if the first element matching the CSS selector contains
-the given text. This asserts calls ``$crawler->filter('html h1.title')``
+the given text. This assert calls ``$crawler->filter('html h1.title')``
 internally, which allows you to use CSS selectors to filter any HTML element in
 the page and check for its existence, attributes, text, etc.