def string_append(filepath, newcontent, backup=false)
      file_append(remote_path, StringIO.new(str), backup)
    end
def string_append(filepath, newcontent, backup=false)
      file_append(remote_path, StringIO.new(str), backup)
    end
Shorthand for +file_append('remote/path', StringIO.new('file content'))+

 Appends the content of the String +str+ to +remote_path+. Returns nil