In its current form, if an error message has two trailing "\n" instead
of one, an empty line is resulted (see engine/job.go for an example of
such usages).
Skipping all trailing whitespaces will give a better error message.
Signed-off-by: Nghia Tran <nghia@google.com>
Upstream-commit: b422d8da8f1d1e51da6cfff4890e6a08252da7c5
Component: engine