bug #14513 [console][formater] allow format toString object. (aitboudad)

This PR was submitted for the 2.7 branch but it was merged into the 2.3 branch instead (closes #14513).

Discussion
----------

[console][formater] allow format toString object.

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

reported by @micayael ( https://twitter.com/juanardissone/status/593859683502325761 )

Commits
-------

70b4964 [console][formater] allow format toString object.

src/Symfony/Component/Console/Formatter/OutputFormatter.php

@@ -142,6 +142,7 @@ class OutputFormatter implements OutputFormatterInterface
      */
     public function format($message)
     {
+        $message = (string) $message;
         $offset = 0;
         $output = '';
         $tagRegex = '[a-z][a-z0-9_=;-]*';

src/Symfony/Component/Console/Tests/Formatter/OutputFormatterTest.php

@@ -166,6 +166,14 @@ class OutputFormatterTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals("\033[37;41msome error\033[0m".$long, $formatter->format('<error>some error</error>'.$long));
     }
 
+    public function testFormatToStringObject()
+    {
+        $formatter = new OutputFormatter(false);
+        $this->assertEquals(
+            'some info', $formatter->format(new TableCell())
+        );
+    }
+
     public function testNotDecoratedFormatter()
     {
         $formatter = new OutputFormatter(false);
@@ -255,3 +263,11 @@ EOF
         ));
     }
 }
+
+class TableCell
+{
+    public function __toString()
+    {
+        return '<info>some info</info>';
+    }
+}