          if self.calcs.start_iteration > 0:
              end_iteration = self.calcs.start_iteration + self.calcs.iterations
              xrng = list(range(self.calcs.start_iteration, end_iteration))
          else:
              xrng = list(range(self.calcs.iterations))
  
          keys = list(self.calcs.stats.keys())
  
          for idx, item in enumerate(self.lines_sort(keys)):
              if initiate:
 
</s> remove         if self.calcs.start_iteration > 0:
            end_iteration = self.calcs.start_iteration + self.calcs.iterations
            xrng = list(range(self.calcs.start_iteration, end_iteration))
 </s> add         if self._calcs.start_iteration > 0:
            end_iteration = self._calcs.start_iteration + self._calcs.iterations
            xrng = list(range(self._calcs.start_iteration, end_iteration)) </s> remove         fulldata = [item for item in self.calcs.stats.values()]
        self.axes_limits_set(fulldata)
 </s> add         fulldata = list(self._calcs.stats.values())
        self._axes_limits_set(fulldata) </s> remove         keys = list(self.calcs.stats.keys())
 </s> add         keys = list(self._calcs.stats.keys()) </s> remove         for idx, item in enumerate(self.lines_sort(keys)):
 </s> add         for idx, item in enumerate(self._lines_sort(keys)): </s> remove             xmax = self.calcs.iterations
 </s> add             xmax = self._calcs.iterations
            xrng = list(range(self._calcs.iterations))
          if self.calcs.start_iteration > 0:
              end_iteration = self.calcs.start_iteration + self.calcs.iterations
              xrng = list(range(self.calcs.start_iteration, end_iteration))
          else:
            xrng = list(range(self._calcs.iterations))
  
          keys = list(self.calcs.stats.keys())
  
          for idx, item in enumerate(self.lines_sort(keys)):
              if initiate:
keep keep keep keep replace keep keep keep keep keep
 Update matplotlib requirement
  - bump min requirement to 3.5.1
  - Fix custom toolbar for v3.5.1
  - Documentation + linting 
lib/gui/display_graph.py