write_object accepts a wiki-prefixed class although the docs say never to pass one

class="xwiki:Sandbox.MCPFieldGuideClass" was accepted and resolved to the local class; the parameter description and man page say "never use a wiki prefix here".

Expected: Either refuse with a message ("classes are wiki-local; drop the wiki prefix") or soften the documentation to "the wiki prefix, if any, must match the target document's wiki and is otherwise ignored".

Actual: Silently accepted.