doc: remove trailing white space

Run a simple script to remove trailing white space and blank
lines at end of file across all documents.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

doc/guides/nics/fail_safe.rst

@@ -155,9 +155,9 @@ This section shows some example of using **testpmd** with a fail-safe PMD.
 
 #. Start testpmd, automatically probing the device 84:00.0 and using it with
    the fail-safe.
- 
+
    .. code-block:: console
- 
+
       $RTE_TARGET/build/app/testpmd -c 0xff -n 4 \
          --vdev 'net_failsafe0,dev(0000:84:00.0),dev(net_ring0)' -- -i
 

doc/guides/prog_guide/graph_lib.rst

@@ -392,4 +392,3 @@ null
 ~~~~
 This node ignores the set of objects passed to it and reports that all are
 processed.
-

doc/guides/prog_guide/regexdev.rst

@@ -174,4 +174,3 @@ the ``nb_ops`` and ``ops`` parameters are now used to specify the max processed
 operations the user wishes to retrieve and the location in which to store them.
 The API call returns the actual number of processed operations returned, this
 can never be larger than ``nb_ops``.
-

doc/guides/sample_app_ug/vmdq_forwarding.rst

@@ -205,4 +205,3 @@ To generate the statistics output, use the following command:
 
 Please note that the statistics output will appear on the terminal where the vmdq_app is running,
 rather than the terminal from which the HUP signal was sent.
-

doc/guides/vdpadevs/features/mlx5.ini

@@ -26,4 +26,3 @@ x86-32               = Y
 x86-64               = Y
 Usage doc            = Y
 Design doc           = Y
-