anchor.diff:  if exist extensions\viewerMD\ (
       cd extensions\viewerMD
       call git fetch --all
  +    call git checkout master
  +    call git pull
   ) else (
       call git clone https://github.com/tagspaces/viewerMD.git extensions\viewerMD
       cd extensions\viewerMD
  
positive.code: if exist extensions\editorText\ (
      cd extensions\editorText
      call git fetch --all
  ) else (
      call git clone https://github.com/tagspaces/editorText.git extensions\editorText
      cd extensions\editorText
  
negative.code: if exist extensions\editorODF\ (
      cd extensions\editorODF
      call git fetch --all
      call git checkout master
      call git pull
  ) else (
      call git clone https://github.com/tagspaces/editorODF.git extensions\editorODF
      cd extensions\editorODF
  