[Process] Added more detail to the exception when the CWD is invalid

src/Symfony/Component/Process/Process.php

@@ -331,7 +331,7 @@ class Process implements \IteratorAggregate
         }
 
         if (!is_dir($this->cwd)) {
-            throw new RuntimeException('The provided cwd does not exist.');
+            throw new RuntimeException(sprintf('The provided cwd "%s" does not exist.', $this->cwd));
         }
 
         $this->process = proc_open($commandline, $descriptors, $this->processPipes->pipes, $this->cwd, $envPairs, $options);

src/Symfony/Component/Process/Tests/ProcessTest.php

@@ -49,7 +49,8 @@ class ProcessTest extends TestCase
 
     /**
      * @expectedException \Symfony\Component\Process\Exception\RuntimeException
-     * @expectedExceptionMessage The provided cwd does not exist.
+     * @expectedExceptionMessage The provided cwd "
+     * @expectedExceptionMessage "does not exist.
      */
     public function testInvalidCwd()
     {