Update docs regarding 2nd argument of DomCrawler text()

The 2nd Argument is true by default, therefore whitespace is trimmed by default.
Passing false will alter the default behaviour.

Previous documentation suggested the other way around.

Author: DanielSiepmann

components/dom_crawler.rst

@@ -220,9 +220,9 @@ Access the value of the first node of the current selection::
     // avoid the exception passing an argument that text() returns when node does not exist
     $message = $crawler->filterXPath('//body/p')->text('Default text content');
 
-    // pass TRUE as the second argument of text() to remove all extra white spaces, including
+    // pass false as the second argument of text() to not remove all extra white spaces, including
     // the internal ones (e.g. "  foo\n  bar    baz \n " is returned as "foo bar baz")
-    $crawler->filterXPath('//body/p')->text('Default text content', true);
+    $crawler->filterXPath('//body/p')->text('Default text content', false);
 
 Access the attribute value of the first node of the current selection::