Accessors should handle commas and other gibberish well

Example of things going wrong:

```
$ learn rails attr_reader :car ,
# def initialize(car, )
#  @car = car
#  @ =
# end
#
# def car
#  @car
# end
#
# def
#  @
# end
```

Already handled OK but can use explicit tests for it:

```
$ learn rails attr_reader :car,
# def initialize(car)
#  @car = car
# end
#
# def car
#  @car
# end
```