Adjusted linting test 008 expectation

Signed-off-by: Ole Herman Schumacher Elgesem <ole@northern.tech>

Author: olehermanse

tests/lint/008_namespace.expected.txt

@@ -2,6 +2,6 @@
   vars:
     "x" string => default:target("arg");
                   ^------------^
-Error: Call to unknown function / bundle / body 'default:target' at at tests/lint/008_namespace.x.cf:15:19
+Error: Call to unknown function / bundle / body 'default:target' at tests/lint/008_namespace.x.cf:15:19
 FAIL: tests/lint/008_namespace.x.cf (1 error)
 Failure, 1 error in total.