Message formatting issue when retries all fail (introspection)

There's some issue with my environment (I guess!) and node introspection failed. However the final error message summarising the problems wasn't displayed correctly and only shows one letter per line, see below. This is running master.

- - -
$ openstack overcloud node import --introspect --provide instackenv.json
Started Mistral Workflow tripleo.baremetal.v1.register_or_update. Execution ID: 4f8f04e0-6432-477f-8f41-4b7ec000141d
Waiting for messages on queue '81daefb1-65e3-46df-95c5-85331f7c20fc' with no timeout.

Nodes set to managed.
Successfully registered node UUID f97347ea-3ec0-4951-8722-68e702cdd858
Successfully registered node UUID 34e1fbbd-e982-4d49-b994-3f0353951e84
Waiting for introspection to finish...
Started Mistral Workflow tripleo.baremetal.v1.introspect. Execution ID: 1ffc714c-9c05-4886-a55a-e4bfa32f3e8a
Waiting for messages on queue '81daefb1-65e3-46df-95c5-85331f7c20fc' with no timeout.
Introspection of node f97347ea-3ec0-4951-8722-68e702cdd858 timed out.
Introspection of node 34e1fbbd-e982-4d49-b994-3f0353951e84 timed out.
Retrying 2 nodes that failed introspection. Attempt 2 of 3
Introspection of node 34e1fbbd-e982-4d49-b994-3f0353951e84 timed out.
Introspection of node f97347ea-3ec0-4951-8722-68e702cdd858 timed out.
Retrying 2 nodes that failed introspection. Attempt 3 of 3
Introspection of node f97347ea-3ec0-4951-8722-68e702cdd858 timed out.
Introspection of node 34e1fbbd-e982-4d49-b994-3f0353951e84 timed out.
Retry limit reached with 2 nodes still failing introspection
Introspection completed with errors:
R
e
t
r
y

l
i
m
i
t

r
e
a
c
h
e
d

w
i
t
h

2

n
o
d
e
s

s
t
i
l
l

f
a
i
l
i
n
g

i
n
t
r
o
s
p
e
c
t
i
o
n

python-tripleoclient-8.0.1-0.20171031220828.557323d.el7.centos.noarch
openstack-tripleo-common-8.1.1-0.20171102011011.289a48a.el7.centos.noarch