minor symfony#16012 fixed typos (fabpot)

This PR was squashed before being merged into the 2.8 branch (closes symfony#16012).

Discussion
----------

fixed typos

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

Commits
-------

3d117ff fixed typos

Author: Tobion

src/Symfony/Component/CssSelector/CssSelector.php

@@ -11,7 +11,7 @@
 
 namespace Symfony\Component\CssSelector;
 
-@trigger_error('The '.__NAMESPACE__.'\CssSelector class is deprecated since version 2.8 and will be removed in 3.0. Use directly the \Symfony\Component\CssSelector\Converter class instead.', E_USER_DEPRECATED);
+@trigger_error('The '.__NAMESPACE__.'\CssSelector class is deprecated since version 2.8 and will be removed in 3.0. Use directly the \Symfony\Component\CssSelector\CssSelectorConverter class instead.', E_USER_DEPRECATED);
 
 /**
  * CssSelector is the main entry point of the component and can convert CSS
@@ -57,7 +57,7 @@
  *
  * @author Fabien Potencier <[email protected]>
  *
- * @deprecated as of 2.8, will be removed in 3.0. Use the \Symfony\Component\CssSelector\Converter class instead.
+ * @deprecated as of 2.8, will be removed in 3.0. Use the \Symfony\Component\CssSelector\CssSelectorConverter class instead.
  */
 class CssSelector
 {
@@ -75,7 +75,7 @@ class CssSelector
      */
     public static function toXPath($cssExpr, $prefix = 'descendant-or-self::')
     {
-        $converter = new Converter(self::$html);
+        $converter = new CssSelectorConverter(self::$html);
 
         return $converter->toXPath($cssExpr, $prefix);
     }

src/Symfony/Component/CssSelector/Tests/ConverterTest.php renamed to src/Symfony/Component/CssSelector/Tests/CssSelectorConverterTest.php

@@ -11,13 +11,13 @@
 
 namespace Symfony\Component\CssSelector\Tests;
 
-use Symfony\Component\CssSelector\Converter;
+use Symfony\Component\CssSelector\CssSelectorConverter;
 
-class ConverterTest extends \PHPUnit_Framework_TestCase
+class CssSelectorConverterTest extends \PHPUnit_Framework_TestCase
 {
     public function testCssToXPath()
     {
-        $converter = new Converter();
+        $converter = new CssSelectorConverter();
 
         $this->assertEquals('descendant-or-self::*', $converter->toXPath(''));
         $this->assertEquals('descendant-or-self::h1', $converter->toXPath('h1'));
@@ -29,7 +29,7 @@ public function testCssToXPath()
 
     public function testCssToXPathXml()
     {
-        $converter = new Converter(false);
+        $converter = new CssSelectorConverter(false);
 
         $this->assertEquals('descendant-or-self::H1', $converter->toXPath('H1'));
     }

src/Symfony/Component/DomCrawler/Crawler.php

@@ -11,7 +11,7 @@
 
 namespace Symfony\Component\DomCrawler;
 
-use Symfony\Component\CssSelector\Converter;
+use Symfony\Component\CssSelector\CssSelectorConverter;
 
 /**
  * Crawler eases navigation of a list of \DOMElement objects.
@@ -41,7 +41,7 @@ class Crawler extends \SplObjectStorage
     private $baseHref;
 
     /**
-     * Whether the Crawler contains HTML or XML content (used when converting CSS to XPath)
+     * Whether the Crawler contains HTML or XML content (used when converting CSS to XPath).
      *
      * @var bool
      */
@@ -659,11 +659,11 @@ public function filterXPath($xpath)
      */
     public function filter($selector)
     {
-        if (!class_exists('Symfony\\Component\\CssSelector\\Converter')) {
+        if (!class_exists('Symfony\\Component\\CssSelector\\CssSelectorConverter')) {
             throw new \RuntimeException('Unable to filter with a CSS selector as the Symfony CssSelector 2.8+ is not installed (you can use filterXPath instead).');
         }
 
-        $converter = new Converter($this->isHtml);
+        $converter = new CssSelectorConverter($this->isHtml);
 
         // The CssSelector already prefixes the selector with descendant-or-self::
         return $this->filterRelativeXPath($converter->toXPath($selector));
@@ -1142,7 +1142,7 @@ private function findNamespacePrefixes($xpath)
     }
 
     /**
-     * Creates a crawler for some subnodes
+     * Creates a crawler for some subnodes.
      *
      * @param \DOMElement|\DOMElement[]|\DOMNodeList|null $nodes
      *