doc: shorten overlong title underlines
Title underlines should match the length of the title. Unfortunately
docutils only catches underlines that are too short.
Add some missing empty lines after titles.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/doc/usage/fit/beaglebone_vboot.rst b/doc/usage/fit/beaglebone_vboot.rst
index 0580ee1..a102be1 100644
--- a/doc/usage/fit/beaglebone_vboot.rst
+++ b/doc/usage/fit/beaglebone_vboot.rst
@@ -86,7 +86,7 @@
Step 2: Build Linux
---------------------
+-------------------
a. Find the kernel image ('Image') and device tree (.dtb) file you plan to
use. In our case it is am335x-boneblack.dtb and it is built with the kernel.