docs: def _do_title_string(self,title_items,cycle):
          '''
          Create title string
  
          Private method that creates a title string for a cycle plot
          out of a list of title_items that are cycle attributes and can
          be obtained with self.get
  
          Parameters
          ----------
          title_items : list
              A list of cycle attributes.
          cycle : scalar
              The cycle for which the title string should be created.
  
          Returns
          -------
          title_string: string
              Title string that can be used to decorate plot.
  
          '''
  
          title_string=[]
          form_str='%4.1F'
  
          for item in title_items:
              num=self.get(item,fname=cycle)
              if num > 999 or num < 0.1:
                  num=log10(num)
                  prefix='log '
              else:
                  prefix=''
              title_string.append(prefix+item+'='+form_str%num)
          tt=''
          for thing in title_string:
              tt = tt+thing+", "
          return tt.rstrip(', ')