Fix assertion when rspec-json_expectations is missing

In 21f5743 the output was changed and
the code path when rspec-json_expectations is present was updated, but
not without. While this is an odd code path (since Gemfile does declare
it as a dependency), it can be hit if a different dependency mechanism
is used and the expectations should be correct.

Fixes: 21f5743

Author: ekohl

spec/unit/puppet-lint/bin_spec.rb

@@ -378,7 +378,7 @@ def initialize(args)
       if respond_to?(:include_json)
         is_expected.to include_json([[{ 'KIND' => 'WARNING' }]])
       else
-        is_expected.to match(%r{\[\n  \{})
+        is_expected.to match(%r{\[\n  \[\n    \{})
       end
     end
   end
@@ -397,7 +397,7 @@ def initialize(args)
       if respond_to?(:include_json)
         is_expected.to include_json([[{ 'KIND' => 'ERROR' }], [{ 'KIND' => 'WARNING' }]])
       else
-        is_expected.to match(%r{\[\n  \{})
+        is_expected.to match(%r{\[\n  \[\n    \{})
       end
     end
   end