Incorrect makemessage command help text

[Cesar Canassa]

The help text from the makemessage commands says this about --extensions flag:

The file extension(s) to examine (default: "html,txt",
or "js" if the domain is "djangojs"). Separate
multiple extensions with commas, or use -e multiple
times.

But the default file extensions is "html,txt,py" and not "html,txt". Not listing the "py" extension might imply that this extension is always set and that user don't need to specify it in case he/she decides to add another extension.

​https://github.com/django/django/pull/4996

[Tim Graham <timograham@…>]

In 561c018:

Fixed #25123 -- Corrected makemessages --extension help text

[Tim Graham <timograham@…>]

In 83b3242:

[1.8.x] Fixed #25123 -- Corrected makemessages --extension help text

Backport of 561c018d88203826cb9fd370e03a28e829871b75 from master