If a variable value has changed and either the new or old value contains
spaces, a word diff should be appropriate and may be a bit more readable.
Import the "simplediff" module and use it to show a word diff (in the
style of GNU wdiff and git diff --word-diff).
Also use a similar style diff to show changes in the runtaskhashes list.
I didn't use an actual word-diff here since it's a little different - we
can be sure that the list is a list and not simply a free-format string.
(Bitbake rev: 20db6b6553c80e18afc4f43dc2495435f7477822)
Signed-off-by: Paul Eggleton <email@example.com>
Signed-off-by: Richard Purdie <firstname.lastname@example.org>