some doc fixes and improvements to parametrized test examples, thanks ccxCZ for review and suggestions.

doc/funcargs.txt

@@ -28,6 +28,8 @@ very useful if you want to test e.g. against different database backends
 or with multiple numerical arguments sets and want to reuse the same set
 of test functions.
 
+.. _funcarg:
+
 Basic funcarg example
 -----------------------
 
@@ -196,6 +198,8 @@ If you want to select only the run with the value ``7`` you could do::
     ======================== 9 tests deselected by '7' =========================
     ================== 1 passed, 9 deselected in 0.01 seconds ==================
 
+You might want to look at :ref:`more parametrization examples <paramexamples>`.
+
 .. _`metafunc object`:
 
 The **metafunc** object