Syntax Error Caused by Generator

[hacktorious]

Running the following command causes a random comma to be inserted in the migration file for an already existing user migration. This in turn causes the migration to fail.

rails generate knock:token_controller user

`class CreateUsers < ActiveRecord::Migration[5.0]
def change
create_table :users do |t|
t.string :f_name
t.string :l_name
t.string, :email <==== A comma was added here for some reason
t.string :password_digest

  t.timestamps
end

end
end`

[hacktorious]

Decided to use a different implementation since I couldn't get this to work.