Use sphinxcontrib-trio extension

This adds some more capabilities to sphinx, like marking
functions as decorators or with contexts

doc/en/builtin.rst

@@ -59,6 +59,8 @@ Fixtures and requests
 To mark a fixture function:
 
 .. autofunction:: _pytest.fixtures.fixture
+    :noindex:
+    :decorator:
 
 Tutorial at :ref:`fixtures`.
 

doc/en/conf.py

@@ -18,8 +18,11 @@
 # The full version, including alpha/beta/rc tags.
 # The short X.Y version.
 
-import os, sys
+import os
+import sys
+
 from _pytest import __version__ as version
+
 release = ".".join(version.split(".")[:2])
 
 # If extensions (or modules to document with autodoc) are in another directory,
@@ -38,7 +41,7 @@ todo_include_todos = 1
 # Add any Sphinx extension module names here, as strings. They can be extensions
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
 extensions = ['sphinx.ext.autodoc', 'sphinx.ext.todo', 'sphinx.ext.autosummary',
-    'sphinx.ext.intersphinx', 'sphinx.ext.viewcode']
+              'sphinx.ext.intersphinx', 'sphinx.ext.viewcode', 'sphinxcontrib_trio']
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
@@ -310,9 +313,7 @@ texinfo_documents = [
 
 
 # Example configuration for intersphinx: refer to the Python standard library.
-intersphinx_mapping = {'python': ('http://docs.python.org/', None),
-#                       'lib': ("http://docs.python.org/2.7library/", None),
-                    }
+intersphinx_mapping = {'python': ('http://docs.python.org/3', None)}
 
 
 def setup(app):

doc/en/requirements.txt

@@ -1,3 +1,4 @@
 # pinning sphinx to 1.4.* due to search issues with rtd:
 # https://github.com/rtfd/readthedocs-sphinx-ext/issues/25
 sphinx ==1.4.*
+sphinxcontrib-trio

tox.ini

@@ -129,6 +129,7 @@ basepython = python
 changedir = doc/en
 deps =
     sphinx
+    sphinxcontrib-trio
     attrs
     PyYAML