PEP8 cleanup: fix number of blank lines

Caught by pep8.

Reviewed-by: James Cameron <quozl@laptop.org>
Acked-by: Simon Schampijer <simon@laptop.org>
CC: Aleksey Lim <alsroot@member.fsf.org>

tests/graphics/common.py

@@ -19,10 +19,12 @@ import gtk
 
 from sugar.graphics.toolbutton import ToolButton
 
+
 class Test(gtk.VBox):
     def __init__(self):
         gtk.VBox.__init__(self)
 
+
 class TestPalette(Test):
     def __init__(self):
         Test.__init__(self)
@@ -39,6 +41,7 @@ class TestPalette(Test):
     def set_palette(self, palette):
         self._invoker.set_palette(palette)
 
+
 class TestRunner(object):
     def run(self, test):
         window = gtk.Window()
@@ -48,6 +51,7 @@ class TestRunner(object):
 
         window.show()
 
+
 def main(test):
     runner = TestRunner()
     runner.run(test)

tests/graphics/hipposcalability.py

@@ -19,6 +19,7 @@ canvas.set_root(scrollbars)
 box = hippo.CanvasBox(padding=10, spacing=10)
 scrollbars.set_root(box)
 
+
 def idle_cb():
     global countdown
 

tests/graphics/iconcache.py

@@ -41,6 +41,7 @@ data = [
     ['battery-090', '#D1A3FF,#00A0FF'],
     ['battery-100', '#AC32FF,#FF2B34']]
 
+
 def _button_activated_cb(button):
     import random
 

tests/lib/test_mime.py

@@ -22,6 +22,7 @@ import unittest
 
 from sugar import mime
 
+
 class TestMime(unittest.TestCase):
     def test_from_file_name(self):
         self.assertEqual(mime.get_from_file_name('test.pdf'),
@@ -76,6 +77,6 @@ class TestMime(unittest.TestCase):
                  'text/plain'])
         self.assertEqual(mime_type, 'text/plain')
 
+
 if __name__ == "__main__":
     unittest.main()
-