Merge pull request #2728 from imobilis/ticket_7884

[WCM] [Process] Doc for output flush methods.

Author: weaverryan

components/process.rst

@@ -45,6 +45,12 @@ output. Alternatively, the :method:`Symfony\\Component\\Process\\Process::getInc
 and :method:`Symfony\\Component\\Process\\Process::getIncrementalErrorOutput`
 methods returns the new outputs since the last call.
 
+.. versionadded:: 2.4
+    The ``flushOutput()`` and ``flushErrorOutput()`` methods were added in Symfony 2.4.
+
+The :method:`Symfony\\Component\\Process\\Process::flushOutput()` method flushes the contents of the output and
+and :method:`Symfony\\Component\\Process\\Process::flushErrorOutput()` the content of the error output.
+
 Getting real-time Process Output
 --------------------------------