ref-manual: fix typo and move SYSROOT_DIRS example

1. Changed one letter (s/B/A), so the sentence is correct again.
2. Moved example from SYSROOT_DIRS_IGNORE into SYSROOT_DIRS section.

(From yocto-docs rev: 9fcd6d6ef4a87f69b8a00907051c1ece41e75a82)

Signed-off-by: Matthias Pritschet <matthias@pritschet.eu>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

documentation/ref-manual/variables.rst

@@ -8123,29 +8123,6 @@ system and gives an overview of their function and contents.
              /sysroot-only \
              "
 
-   :term:`SYSROOT_DIRS_IGNORE`
-      Directories that are not staged into the sysroot by the
-      :ref:`ref-tasks-populate_sysroot` task. You
-      can use this variable to exclude certain subdirectories of
-      directories listed in :term:`SYSROOT_DIRS` from
-      staging. By default, the following directories are not staged::
-
-         SYSROOT_DIRS_IGNORE = " \
-             ${mandir} \
-             ${docdir} \
-             ${infodir} \
-             ${datadir}/X11/locale \
-             ${datadir}/applications \
-             ${datadir}/bash-completion \
-             ${datadir}/fonts \
-             ${datadir}/gtk-doc/html \
-             ${datadir}/installed-tests \
-             ${datadir}/locale \
-             ${datadir}/pixmaps \
-             ${datadir}/terminfo \
-             ${libdir}/${BPN}/ptest \
-             "
-
       Consider the following example in which you need to manipulate this variable.
       Assume you have a recipe ``A`` that provides a shared library ``.so.*`` that is
       installed into a custom folder other than "``${libdir}``"
@@ -8157,7 +8134,7 @@ system and gives an overview of their function and contents.
          is just to show the usefulness of setting :term:`SYSROOT_DIRS`.
 
       When a recipe ``B`` :term:`DEPENDS` on ``A``, it means what is in
-      :term:`SYSROOT_DIRS` will be copied from :term:`D` of the recipe ``B``
+      :term:`SYSROOT_DIRS` will be copied from :term:`D` of the recipe ``A``
       into ``B``'s :term:`SYSROOT_DESTDIR` that is "``${WORKDIR}/sysroot-destdir``".
 
       Now, since ``/opt/lib`` is not in :term:`SYSROOT_DIRS`, it will never be copied to
@@ -8175,6 +8152,29 @@ system and gives an overview of their function and contents.
 
             TARGET_LDFLAGS:append = " -L${RECIPE_SYSROOT}/opt/lib"
 
+   :term:`SYSROOT_DIRS_IGNORE`
+      Directories that are not staged into the sysroot by the
+      :ref:`ref-tasks-populate_sysroot` task. You
+      can use this variable to exclude certain subdirectories of
+      directories listed in :term:`SYSROOT_DIRS` from
+      staging. By default, the following directories are not staged::
+
+         SYSROOT_DIRS_IGNORE = " \
+             ${mandir} \
+             ${docdir} \
+             ${infodir} \
+             ${datadir}/X11/locale \
+             ${datadir}/applications \
+             ${datadir}/bash-completion \
+             ${datadir}/fonts \
+             ${datadir}/gtk-doc/html \
+             ${datadir}/installed-tests \
+             ${datadir}/locale \
+             ${datadir}/pixmaps \
+             ${datadir}/terminfo \
+             ${libdir}/${BPN}/ptest \
+             "
+
    :term:`SYSROOT_DIRS_NATIVE`
       Extra directories staged into the sysroot by the
       :ref:`ref-tasks-populate_sysroot` task for