manuals: improve references to classes

- Simplify references to class sections, by replacing references such as
  :ref:`image.bbclass <ref-classes-image>`
  by
  :ref:`ref-classes-image`

  That's equivalent, because the class sections always called <class>.bbclass

- Adding references to class sections, by replacing strings such as
  ``image.bbclass``
  by
  :ref:`ref-classes-image`

- Simplifying a few class section links

(From yocto-docs rev: 29d66aaa898390c19f121baf0f4fdcc178e4cd80)

Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 3 deletions

diff --git a/documentation/dev-manual/common-tasks.rst b/documentation/dev-manual/common-tasks.rst
index f8ee774077..d35b590ee1 100644
--- a/documentation/dev-manual/common-tasks.rst
+++ b/documentation/dev-manual/common-tasks.rst
@@ -4393,7 +4393,7 @@ This next example shows how to accomplish the same thing by setting
    locally inherit the :ref:`externalsrc <ref-classes-externalsrc>`
    class.
 
-By default, ``externalsrc.bbclass`` builds the source code in a
+By default, :ref:`ref-classes-externalsrc` builds the source code in a
 directory separate from the external source directory as specified by
 :term:`EXTERNALSRC`. If you need
 to have the source built in the same directory in which it resides, or
@@ -6246,8 +6246,7 @@ system to make your images more secure:
    :ref:`extrausers <ref-classes-extrausers>`
    class, which is the preferred method. For an example on how to set up
    both root and user passwords, see the
-   ":ref:`extrausers.bbclass <ref-classes-extrausers>`"
-   section.
+   ":ref:`ref-classes-extrausers`" section.
 
    .. note::