Document char[] input support in clojure.java.io/copy

Description

https://github.com/clojure/clojure/blob/a26dfc1390c53ca10dba750b8d5e6b93e846c067/src/clj/clojure/java/io.clj#L393

copy actually supports char[] as input (see lines 373-380), so add to docstring.

Prescreened by: Alex Miller - tests already exist for this behavior, just not in docstring

Environment

None
Completed

Assignee

Unassigned

Reporter

Yegor Timoshenko

Labels

Approval

Ok

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Priority

Trivial
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