s='id identifier rubyid_text'>text</span> <span class='op'>=</span> <span class='id identifier rubyid_feasibility_messages'>feasibility_messages</span><span class='lparen'>(</span><span class='id identifier rubyid_action_name'>action_name</span><span class='rparen'>)</span><span class='period'>.</span><span class='id identifier rubyid_join'>join</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>, </span><span class='tstring_end'>&#39