diff --git a/pygal/__init__.py b/pygal/__init__.py
index 3af5136..9ec4e4c 100644
--- a/pygal/__init__.py
+++ b/pygal/__init__.py
@@ -21,7 +21,7 @@ Pygal -  A python svg graph plotting library
 
 """
 
-__version__ = '0.12.2'
+__version__ = '0.13.0'
 import sys
 from pygal.config import Config
 from pygal.ghost import Ghost
diff --git a/pygal/graph/graph.py b/pygal/graph/graph.py
index e30c0a4..a86fd60 100644
--- a/pygal/graph/graph.py
+++ b/pygal/graph/graph.py
@@ -101,8 +101,7 @@ class Graph(BaseGraph):
         a = self.svg.node(self.nodes['tooltip'], 'a')
         self.svg.node(a, 'rect',
                       id="tooltip-box",
-                      rx=5, ry=5, width=0, height=0
-                  )
+                      rx=5, ry=5, width=0, height=0)
         text = self.svg.node(a, 'text', class_='text')
         self.svg.node(text, 'tspan', class_='label')
         self.svg.node(text, 'tspan', class_='value')
@@ -207,7 +206,7 @@ class Graph(BaseGraph):
             if not truncation:
                 available_space = self.view.width / cols - (
                     self.legend_box_size + 5)
-                truncation = revesre_text_len(
+                truncation = reverse_text_len(
                     available_space, self.legend_font_size)
         else:
             x = self.margin.left + self.view.width + 10
diff --git a/pygal/graph/xy.py b/pygal/graph/xy.py
index da7eecb..6d6a06d 100644
--- a/pygal/graph/xy.py
+++ b/pygal/graph/xy.py
@@ -64,6 +64,13 @@ class XY(Line):
             yvals = [val[1]
                      for serie in self.series
                      for val in serie.interpolated]
+            if xvals:
+                xmin = min(xvals)
+                xmax = max(xvals)
+                rng = (xmax - xmin)
+            else:
+                rng = None
+
         if rng:
             self._box.xmin, self._box.xmax = min(xvals), max(xvals)
             self._box.ymin, self._box.ymax = min(yvals), max(yvals)