Page in syntax 1.0 containing code for Comments/History/Attachment/Information sections is not properly converted

Steps to reproduce:

• Import a page in syntax 1.0 containing the following code:

  #set ($showcomments="no")
  #set ($showattachments = "no")
  #set ($showhistory="no")
  #set ($showinformation = "no")
  

• Convert the page to 2.1
  Result:

  {{velocity filter="none"}}
  {{html clean="false" wiki="true"}}
  #set ($showcomments="no")
  #set ($showattachments = "no")
  #set ($showhistory="no")
  #set ($showinformation = "no")
  
  {{/html}}
  {{/velocity}}
  

  Expected result: the variables need to be false to properly hide the sections (see http://platform.xwiki.org/xwiki/bin/view/DevGuide/Scripting#HControllingWhichSectionstoDisplay).