Fix info/lookup fallback: response has an extra level

When doing a var-info lookup we potentially try three different strategies: info, lookup, and eval. The second currently always fails, because the "info" dict is not at the top level in the response message, but nested under an "info" key.

Author: plexus

cider-client.el

@@ -637,7 +637,7 @@ CONTEXT represents a completion context for compliment."
  (cider-nrepl-send-sync-request (cider-current-repl)))))
  (if (member "lookup-error" (nrepl-dict-get var-info "status"))
  nil
- var-info)))
+ (nrepl-dict-get var-info "info"))))
 
 (defun cider-sync-request:eldoc (symbol &optional class member)
  "Send \"eldoc\" op with parameters SYMBOL or CLASS and MEMBER."