manuals: improve initramfs details

- Create a new entry in the glossary
- Add implementation details
- Replace the mention of "init ramdisk" by "initramfs¨
  whenever possible
- Remove obsolete and duplicate information
- Fix spacing issues in the Sphinx code

(From yocto-docs rev: 952c7e6dee49532705b2c162f4728e635c38df3f)

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

1 files changed, 2 insertions, 2 deletions

diff --git a/documentation/migration-guides/migration-3.2.rst b/documentation/migration-guides/migration-3.2.rst
index 92b7f91f2c..cc6f05322a 100644
--- a/documentation/migration-guides/migration-3.2.rst
+++ b/documentation/migration-guides/migration-3.2.rst
@@ -265,10 +265,10 @@ using the GL options.
 
 .. _migration-3.2-initramfs-suffix:
 
-initramfs images now use a blank suffix
+Initramfs images now use a blank suffix
 ---------------------------------------
 
-The reference initramfs images (``core-image-minimal-initramfs``,
+The reference :term:`Initramfs` images (``core-image-minimal-initramfs``,
 ``core-image-tiny-initramfs`` and ``core-image-testmaster-initramfs``) now
 set an empty string for :term:`IMAGE_NAME_SUFFIX`, which otherwise defaults
 to ``".rootfs"``. These images aren't root filesystems and thus the rootfs