You're just being obtuse. It's been explained multiple times that there are tools external to the version control systems that can generate and consume this format. Just because there's no 'svn-diffx' or 'hg-diffx' command/tool built into the vcs itself, doesn't mean that this format can't be generated and used by other tools.
So to answer your question, any vcs that has had tools written for it to generate this format. And it sounds like it's most of the major ones as far as Review Board is concerned.
alt Hacker News
You're just being obtuse. It's been explained multiple times that there are tools external to the version control systems that can generate and consume this format. Just because there's no 'svn-diffx' or 'hg-diffx' command/tool built into the vcs itself, doesn't mean that this format can't be generated and used by other tools.
So to answer your question, any vcs that has had tools written for it to generate this format. And it sounds like it's most of the major ones as far as Review Board is concerned.