manuals: code insertion simplification over two lines

This simplifies paragraphs ending with a colon and followed
by code insertion.

Automatically substituted through the command:
sed -i -z "s/:\n\s*::/::/g" file.rst

This generates identical HTML output.

(From yocto-docs rev: 28e2192a7c12d64b68061138a9f6c796453eebb1)

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

documentation/ref-manual/terms.rst

@@ -26,8 +26,7 @@ universal, the list includes them just in case:
 
       When you name an append file, you can use the "``%``" wildcard character
       to allow for matching recipe names. For example, suppose you have an
-      append file named as follows:
-      ::
+      append file named as follows::
 
          busybox_1.21.%.bbappend