 class='collection vector'><span class='delimiter'>[</span>&apos;<span class='collection list'><span class='delimiter'>(</span><span class='symbol'>set!</span> <span class='symbol'>*print-err-fn*</span> <span class='collection list'><span class='delimiter'>(</span><span class='symbol'>fn</span> <span class='collection vector'><span class='delimiter'>[</span><span class='symbol'>_</span><span class='delimiter'>]</span></span><span class='delimiter'>)</span></span><span class='delimiter'>)</span></span> <span