- make importorskip static at py.test.importorskip because it's

used for conditional plugin loading
- fix case where xfail is defined at module/class level
- fixes and improvements to docs, correct links to plugins
- use new skip facilities here and there

--HG--
branch : trunk

testing/code/test_assertion.py

@@ -135,11 +135,7 @@ def test_assert_with_brokenrepr_arg():
 class TestView:
 
     def setup_class(cls):
-        try:
-            from _py.code._assertionold import View
-        except ImportError:
-            py.test.skip("requires the compile package")
-        cls.View = View
+        cls.View = py.test.importorskip("_py.code._assertionold").View
 
     def test_class_dispatch(self):
         ### Use a custom class hierarchy with existing instances

testing/code/test_source.py

@@ -191,9 +191,8 @@ class TestSourceParsingAndCompiling:
         assert len(source) == 9
         assert source.getstatementrange(5) == (0, 9)
 
+    @py.test.mark.skipif("sys.version_info < (2,6)")
     def test_compile_to_ast(self):
-        if sys.version_info < (2, 6):
-            py.test.skip("requires Python 2.6")
         import ast
         source = Source("x = 4")
         mod = source.compile(flag=ast.PyCF_ONLY_AST)
@@ -257,7 +256,6 @@ def test_getstartingblock_multiline():
     assert len(l) == 4
 
 def test_getline_finally():
-    #py.test.skip("inner statements cannot be located yet.")
     def c(): pass
     excinfo = py.test.raises(TypeError, """
            teardown = None