Fix a couple style issues

qutebrowser/mainwindow/tabwidget.py

@@ -488,8 +488,7 @@ class TabBar(QTabBar):
 
     def _pinned_statistics(self) -> (int, int):
         """Get the number of pinned tabs and the total width of pinned tabs."""
-        pinned_list = [idx
-                       for idx in range(self.count())
+        pinned_list = [idx for idx in range(self.count())
                        if self._tab_pinned(idx)]
         pinned_count = len(pinned_list)
         pinned_width = sum(self.minimumTabSizeHint(idx, ellipsis=False).width()

qutebrowser/misc/utilcmds.py

@@ -185,8 +185,8 @@ def debug_cache_stats():
     tabbed_browser = objreg.get('tabbed-browser', scope='window',
                                 window='last-focused')
     # pylint: disable=protected-access
-    tabbed_browser_info = tabbed_browser.tabBar(). \
-        _minimum_tab_size_hint_helper.cache_info()
+    tab_bar = tabbed_browser.tabBar()
+    tabbed_browser_info = tab_bar._minimum_tab_size_hint_helper.cache_info()
     # pylint: enable=protected-access
 
     log.misc.debug('is_valid_prefix: {}'.format(prefix_info))

tests/unit/mainwindow/test_tabwidget.py

@@ -64,9 +64,4 @@ class TestTabWidget:
         with qtbot.waitExposed(widget):
             widget.show()
 
-        def bench():
-            for _a in range(1000):
-                # pylint: disable=protected-access
-                widget._update_tab_titles()
-                # pylint: enable=protected-access
-        benchmark(bench)
+        benchmark(widget._update_tab_titles)