Style and type adjustment for the widget fix

Added proper whitespace and mypy type ignore

qutebrowser/mainwindow/statusbar/bar.py

@@ -288,7 +288,7 @@ class StatusBar(QWidget):
                        self.keystring, self.prog, self.clock, *self._text_widgets]:
             assert isinstance(widget, QWidget)
             if widget in [self.prog, self.backforward]:
-                widget.enabled=False
+                widget.enabled = False # type: ignore[attr-defined]
             widget.hide()
             self._hbox.removeWidget(widget)
         self._text_widgets.clear()