Use "inc" instead of "func" in the snipped on README and doc index

"inc" reads better, also fixed the line separators so
they have the same size

README.rst

@@ -24,31 +24,31 @@ An example of a simple test:
 .. code-block:: python
 
     # content of test_sample.py
-    def func(x):
+    def inc(x):
         return x + 1
 
     def test_answer():
-        assert func(3) == 5
+        assert inc(3) == 5
 
 
 To execute it::
 
     $ pytest
-    ======= test session starts ========
+    ============================= test session starts =============================    
     collected 1 items
 
     test_sample.py F
 
-    ======= FAILURES ========
-    _______ test_answer ________
+    ================================== FAILURES ===================================
+    _________________________________ test_answer _________________________________
 
         def test_answer():
-    >       assert func(3) == 5
+    >       assert inc(3) == 5
     E       assert 4 == 5
-    E        +  where 4 = func(3)
+    E        +  where 4 = inc(3)
 
     test_sample.py:5: AssertionError
-    ======= 1 failed in 0.12 seconds ========
+    ========================== 1 failed in 0.04 seconds ===========================
 
 
 Due to ``pytest``'s detailed assertion introspection, only plain ``assert`` statements are used. See `getting-started <http://docs.pytest.org/en/latest/getting-started.html#our-first-test-run>`_ for more examples.

doc/en/index.rst

@@ -14,33 +14,31 @@ An example of a simple test:
 .. code-block:: python
 
     # content of test_sample.py
-    def func(x):
+    def inc(x):
         return x + 1
 
     def test_answer():
-        assert func(3) == 5
+        assert inc(3) == 5
 
 
 To execute it::
 
     $ pytest
-    ======= test session starts ========
-    platform linux -- Python 3.5.2, pytest-3.0.4, py-1.4.31, pluggy-0.4.0
-    rootdir: $REGENDOC_TMPDIR, inifile: 
+    ============================= test session starts =============================    
     collected 1 items
-    
+
     test_sample.py F
-    
-    ======= FAILURES ========
-    _______ test_answer ________
-    
+
+    ================================== FAILURES ===================================
+    _________________________________ test_answer _________________________________
+
         def test_answer():
-    >       assert func(3) == 5
+    >       assert inc(3) == 5
     E       assert 4 == 5
-    E        +  where 4 = func(3)
-    
+    E        +  where 4 = inc(3)
+
     test_sample.py:5: AssertionError
-    ======= 1 failed in 0.12 seconds ========
+    ========================== 1 failed in 0.04 seconds ===========================
 
 Due to ``pytest``'s detailed assertion introspection, only plain ``assert`` statements are used.
 See :ref:`Getting Started <getstarted>` for more examples.