document `-e` argument for rails console
this adds documentation for -e flag which sets the environment of the rails console like the `rails server` command.
|@@ -278,6 +278,12 @@ The +console+ command lets you interact with your Rails application from the com|
|You can also use the alias "c" to invoke the console: <tt>rails c</tt>.|
|+You can specify the environment in which the +console+ command should operate using the +-e+ switch.|
|+$ rails console -e staging|
|If you wish to test out some code without changing any data, you can do that by invoking +rails console --sandbox+.|