fixed a syntax problem that was preventing a warning box from being displayed

docs/docsite/rst/network_debug_troubleshooting.rst

@@ -36,7 +36,7 @@ Errors generally fall into one of the following categories:
   * Not using ``connection: local``
 
 
-.. warning: ``unable to open shell`
+.. warning:: ``unable to open shell``
 
   The ``unable to open shell`` message is new in Ansible 2.3, it means that the ``ansible-connection`` daemon has not been able to successfully
   talk to the remote network device. This generally means that there is an authentication issue. See the "Authentication and connection issues" section
@@ -508,39 +508,38 @@ Add `authorize: yes` to the task. For example:
 
 .. delete_to not honoured
    ----------------------
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    FIXME Do we get an error message
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    FIXME Link to howto
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    fixmes
    ======
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    Error: "number of connection attempts exceeded, unable to connect to control socket"
    ------------------------------------------------------------------------------------
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    **Platforms:** Any
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    This occurs when Ansible wasn't able to connect to the remote device and obtain a shell with the timeout.
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    This information is available when ``ANSIBLE_LOG_PATH`` is set see (FIXMELINKTOSECTION):
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    .. code-block:: yaml
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      less $ANSIBLE_LOG_PATH
      2017-03-10 15:32:06,173 p=19677 u=fred |  connect retry timeout expired, unable to connect to control socket
      2017-03-10 15:32:06,174 p=19677 u=fred |  persistent_connect_retry_timeout is 15 secs
      2017-03-10 15:32:06,222 p=19669 u=fred |  fatal: [veos01]: FAILED! => {
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    Suggestions to resolve:
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    Do stuff For example:
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    .. code-block:: yaml
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    	Example stuff
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