pan class='op'>+=</span> <span class='tstring'><span class='tstring_beg'>&quot;</span><span class='tstring_content'>longest step </span><span class='embexpr_beg'>#{</span><span class='ivar'>@slowest_mark</span><span class='embexpr_end'>}</span><span class='tstring_end'>&quot;</span></span>
  <span class='id identifier rubyid_puts'>puts</span> <span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>=</span><span class='tstring_end'>&#39;</span></span> <span class='op'>*</spa