Fix #336

docs/documentation/custom_styles.rst

@@ -146,12 +146,10 @@ NB: Now the css rules are prefixed by an unique id, to prevent collisions when i
   with open(custom_css_file, 'w') as f:
     f.write(custom_css)
   config = pygal.Config(fill=True, interpolate='cubic')
-  config.css.append(custom_css_file)
+  config.css.append('file://' + custom_css_file)
   chart = pygal.StackedLine(config)
   chart.add('A', [1, 3,  5, 16, 13, 3,  7])
   chart.add('B', [5, 2,  3,  2,  5, 7, 17])
   chart.add('C', [6, 10, 9,  7,  3, 1,  0])
   chart.add('D', [2,  3, 5,  9, 12, 9,  5])
   chart.add('E', [7,  4, 2,  1,  2, 10, 0])
-
-

pygal/svg.py

@@ -103,9 +103,11 @@ class Svg(object):
             if css.startswith('inline:'):
                 css_text = css[len('inline:'):]
             elif css.startswith('file://'):
+                css = css[len('file://'):]
+
                 if not os.path.exists(css):
                     css = os.path.join(
-                        os.path.dirname(__file__), 'css', css[len('file://'):])
+                        os.path.dirname(__file__), 'css', css)
 
                 with io.open(css, encoding='utf-8') as f:
                     css_text = template(