spring-projects/spring-xd — pull request #461 by ericbottard (2013-12-10 14:39:09+00:00)
Title: XD-1108: Allows --foo <space> bar on the cmd line

Arguably a lot of work for a space in the cmdline.

Sadly, the help screen is not even pretty and I found no way to declare what values are accepted (only their *type*)