Improve clojure.repl/dir-fn to work on namespace aliases in addition to canonical namespaces.

Description

Extend clojure.repl/dir to work with the aliases in the current namespace

After:

user=> (require '[clojure.string :as s])
nil
user=> (dir s)
blank?
capitalize
...etc

Patch: clj-1673-3.patch

Screened by: Alex Miller

None

Unassigned

Jason Whitlark

Code and Test

Release 1.7

Minor