The plugin manager rest api returns the wrong dependencies or else the wiki does.
As an example: https://cloudbees.ci.cloudbees.com/pluginManager/api/json?depth=3

...then search for "Jenkins Subversion Plug-in"...

The dependencies list looks sorta like this:
dependencies: [
shortName: "ssh-credentials",
shortName: "credentials",
shortName: "scm-api",
shortName: "mapdb-api",
shortName: "matrix-auth",
shortName: "windows-slaves",
shortName: "antisamy-markup-formatter",
shortName: "matrix-project",
shortName: "junit",
]

....but according to https://wiki.jenkins-ci.org/display/JENKINS/Subversion+Plugin, Subversion should have the following dependencies:
scm-api (version:0.2)
credentials (version:1.10)
ssh-credentials (version:1.6.1)
mapdb-api (version:1.0.1.0)

...mapdb-api is missing from the rest api, and several of the plugins listed from the rest api are not on the wiki. I am figuring some other plugin's dependencies is being listed one of these places.