keep_var_for_in: {
    options = {
        hoist_vars: true,
        unused: true
    };
    input: {
        (function(obj){
            var foo = 5;
            for (var i in obj)
                return foo;
        })();
    }
    expect: {
        (function(obj){
            var i, foo = 5;
            for (i in obj)
                return foo;
        })();
    }
}
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<div class='path'>path: <a href='/guix/log/?id=39b8e41927b1f4e91560a781a039ca36c52a68f3'>root</a>/<a href='/guix/log/tests?id=39b8e41927b1f4e91560a781a039ca36c52a68f3'>tests</a>/<a href='/guix/log/tests/opam.scm?id=39b8e41927b1f4e91560a781a039ca36c52a68f3'>opam.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/opam.scm?id=39b8e41927b1f4e91560a781a039ca36c52a68f3&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-01-17 14:22:07 +0100'>2020-01-17</span></td><td><a href='/guix/commit/tests/opam.scm?id=282f91790a5bbd0d9b3223c4bfd45b66e418c200'>import: opam: Avoid uses of '@@' in tests.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/import/opam.scm (string-pat, multiline-string, list-pat)
(dict, condition): Export.
(opam-fetch): Add optional 'repository' parameter.
(opam-&gt;guix-package): Add #:repository parameter and pass it to
'opam-fetch'.
* tests/opam.scm ("opam-&gt;guix-package"): Remove use of 'mock' and pass
TEST-REPO to 'opam-&gt;guix-package' instead.
("parse-strings", "parse-multiline-strings")
("parse-lists", "parse-dicts", "parse-conditions"): Remove uses of '@@',
which are no longer needed.
</span></span></td><td>Ludovic Courtès</td></tr>