Fix terminal code formatting

* Update highlight plugin not remove spacing

This will allow indentation on multi-line terminal outputs to be space-indented:

```
1) View the homepage visitor sees relevant information
     Failure/Error: visit root_path
     NameError:
       undefined local variable or method `root_path' for
     # <RSpec::Core::ExampleGroup::Nested_1:0x007fcf6963e9e0>
     # ./spec/features/visit_the_homepage_spec.rb:5:in `block (2 levels) in <top(required)>'

```

Instead of this:

```
1) View the homepage visitor sees relevant information
Failure/Error: visit root_path
NameError:
undefined local variable or method `root_path' for
#<RSpec::Core::ExampleGroup::Nested_1:0x007fcf6963e9e0>
# ./spec/features/visit_the_homepage_spec.rb:5:in `block (2 levels) in <top
(required)>'
```