Limit sphinx version on python 2.6. (#24678)

* Limit sphinx version on python 2.6.
* Fix issues identified by rstcheck.

docs/docsite/rst/dev_guide/developing_modules.rst

@@ -41,7 +41,7 @@ For more information about action plugins, go `here <https://docs.ansible.com/an
 
 3. Should you use a role instead?
 
-Check out the roles documentation `here <http://docs.ansible.com/ansible/playbooks_roles.html#roles>`_.
+Check out the `roles documentation <http://docs.ansible.com/ansible/playbooks_roles.html#roles>`_.
 
 
 .. _developing_modules_all:

docs/docsite/rst/dev_guide/developing_modules_documenting.rst

@@ -219,7 +219,7 @@ RETURN Block
 The RETURN section documents what the module returns, and is required for all new modules.
 
 For each value returned, provide a ``description``, in what circumstances the value is ``returned``,
-the ``type`` of the value and a ``sample``.  For example, from the ``copy`` module::
+the ``type`` of the value and a ``sample``.  For example, from the ``copy`` module:
 
 
 The following fields can be used and are all required unless specified otherwise.

docs/docsite/rst/dev_guide/developing_modules_general.rst

@@ -33,9 +33,9 @@ Ok, let's get going with an example.  We're going to use Python.  For starters,
     import json
 
     date = str(datetime.datetime.now())
-    print json.dumps({
+    print(json.dumps({
         "time" : date
-    })
+    }))
 
 .. _module_testing:
 
@@ -146,10 +146,10 @@ a lot shorter than this:
                 # can be added.
 
                 if rc != 0:
-                    print json.dumps({
+                    print(json.dumps({
                         "failed" : True,
                         "msg"    : "failed setting the time"
-                    })
+                    }))
                     sys.exit(1)
 
                 # when things do not fail, we do not
@@ -160,10 +160,10 @@ a lot shorter than this:
                 # notifiers to be used in playbooks.
 
                 date = str(datetime.datetime.now())
-                print json.dumps({
+                print(json.dumps({
                     "time" : date,
                     "changed" : True
-                })
+                }))
                 sys.exit(0)
 
     # if no parameters are sent, the module may or
@@ -171,9 +171,9 @@ a lot shorter than this:
     # return the time
 
     date = str(datetime.datetime.now())
-    print json.dumps({
+    print(json.dumps({
         "time" : date
-    })
+    }))
 
 Let's test that module::
 

docs/docsite/rst/dev_guide/developing_plugins.rst

@@ -84,6 +84,7 @@ Callback plugins are created by creating a new class with the Base(Callbacks) cl
   from ansible import constants as C
 
   class CallbackModule(CallbackBase):
+      pass
 
 From there, override the specific methods from the CallbackBase that you want to provide a callback for. For plugins intended for use with Ansible version 2.0 and later, you should only override methods that start with `v2`. For a complete list of methods that you can override, please see ``__init__.py`` in the `lib/ansible/plugins/callback <https://github.com/ansible/ansible/tree/devel/lib/ansible/plugins/callback>`_ directory.
 

docs/docsite/rst/playbooks_filters.rst

@@ -645,6 +645,7 @@ To always exhaust all list use ``zip_longest``::
 
 
 .. versionadded:: 2.4
+
 To format a date using a string (like with the shell date command), use the "strftime" filter::
 
     # Display year-month-day

test/runner/requirements/constraints.txt

@@ -1,3 +1,4 @@
 coverage >= 4.2, != 4.3.2 # features in 4.2+ required, avoid known bug in 4.3.2 on python 2.6
 pywinrm >= 0.2.1 # 0.1.1 required, but 0.2.1 provides better performance
 pylint >= 1.5.3, < 1.7.0 # 1.4.1 adds JSON output, but 1.5.3 fixes bugs related to JSON output
+sphinx < 1.6 ; python_version < '2.7' # sphinx 1.6 and later require python 2.7 or later