flake8 compliance

photobooth/gui/Qt5Gui/Frames.py

@@ -583,7 +583,7 @@ class Settings(QtWidgets.QFrame):
         num_x.setRange(1, 99)
         num_x.setValue(self._cfg.getInt('Picture', 'num_x'))
         self.add('Picture', 'num_x', num_x)
-        
+
         num_y = QtWidgets.QSpinBox()
         num_y.setRange(1, 99)
         num_y.setValue(self._cfg.getInt('Picture', 'num_y'))
@@ -593,7 +593,7 @@ class Settings(QtWidgets.QFrame):
         size_x.setRange(1, 999999)
         size_x.setValue(self._cfg.getInt('Picture', 'size_x'))
         self.add('Picture', 'size_x', size_x)
-        
+
         size_y = QtWidgets.QSpinBox()
         size_y.setRange(1, 999999)
         size_y.setValue(self._cfg.getInt('Picture', 'size_y'))

photobooth/gui/Qt5Gui/__init__.py

@@ -18,7 +18,7 @@
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
 # Available style sheets as tuples of (style name, style file)
-styles = (('default', 'stylesheets/default.qss'), 
-		  ('dark', 'stylesheets/dark.qss'))
+styles = (('default', 'stylesheets/default.qss'),
+          ('dark', 'stylesheets/dark.qss'))
 
 from .PyQt5Gui import PyQt5Gui  # noqa

photobooth/gui/Qt5Gui/stylesheets/dark.qss

@@ -10,6 +10,10 @@ QTabWidget {
     color: #eeeeee;
 }
 
+QTabWidget::tab-bar {
+    alignment: center;
+}
+
 QTabBar::tab {
     background-color: #333333;
     border-style: outset;