[PATCH] test-manual: clarify that ptest-runner is added automatically

Given that ptest-runner is referenced with RRECOMMENDS in
ptest.bbclass:

  RRECOMMENDS:${PN}-ptest += "ptest-runner"

clarify that it will automatically be added to an image as long as
some ptest package is included in the image.

Signed-off-by: Robert P. J. Day <[email protected]>

---

diff --git a/documentation/test-manual/ptest.rst b/documentation/test-manual/ptest.rst
index 4b91e6fc3..2b8672214 100644
--- a/documentation/test-manual/ptest.rst
+++ b/documentation/test-manual/ptest.rst
@@ -84,8 +84,8 @@ During the execution ``ptest-runner`` keeps count of total and failed
 ``ptests``. At end the execution summary is written to the console.
 If any of the ``run-ptest`` fails, ``ptest-runner`` returns '1'.

-Consequently, you might want to add ``ptest-runner`` to your image.
-
+The inclusion of any ptest packages in your image will automatically
+include ``ptest-runner`` in your image.

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