Right, thanks for noticing this.

Here's the change I am going to make:

The code will use command.get_command_name() *everywhere* for the help 
display.

This method implemented in Command does the following:

- if the attribute "command_name" is present, it is returned
- __class__.__name__ ortherwise.

Meaning that you can define the name you want in the class.

Notice that this is under-documented so I need to add some document
for that behavior/feature.

I will not push this change in 2.7 since I don't consider this as a 
bug.