fix bug

app/views/homework_commons/works_list.xlsx.axlsx

@@ -1,5 +1,6 @@
 
 wb = xlsx_package.workbook
+wb.use_autowidth = false
 wb.styles do |s|
   sz_all = s.add_style :border => { :style => :thin, :color =>"000000" },:alignment => {:horizontal => :center}
   blue_cell = s.add_style :bg_color => "FAEBDC", :sz => 10,:height => 20,:b => true, :border => { :style => :thin, :color =>"000000" },:alignment => {:horizontal => :center}