Indentation should not increase when defining methods in the newer single-line syntax

## Problem

When defining methods with the one-line syntax, indentation increases.

### Expected

```
[2] pry(main)> class Foo
[2] pry(main)*   def biz = "biz"
[2] pry(main)*   def bar = "baar"
[2] pry(main)* end
```

### Actual

```
[2] pry(main)> class Foo
[2] pry(main)*   def biz = "biz"
[2] pry(main)*     def bar = "baar"
[2] pry(main)*     end
```