MarcWeber/vim-addon-manager — comment on commit 4f561ffc8ebdf1b34d7f22cbede7b3b15361c484
File:  line 0
By MarcWeber:

Excerpts from ZyX-I's message of Sun Feb 26 09:59:04 +0100 2012:
> This modifies passed dictionary which may be unexpected. My version does not.
If anybody hits this case and complains about it I'll pay you $100 :)

Moreover its the simple style I use in all of my plugins - and it gets
the job done reasonably.

I see that there is a difference. But I don't think it matters.