- TestPluginDirs and TestEffectiveFramework over go list JSON fixtures and
git checkouts; TestResolveInstall against an in-memory registry;
TestAppendManifestPlugins for the in-place summer.yaml edit
- fix: a package of the application's own module was reported as a
submodule with the application's git describe; it is in-app (local)
- fix: summer.yaml items written as '- id:' keep their spacing when
plugin:add or plugin:install appends to them