[pitivi] Fix pylint consider-merging-isinstance

[Thibault Saunier <tsaunier src gnome org>]

commit c7cb01659c2cbbce5855f23a765cfd8242edaa68
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Sun Oct 27 06:30:16 2019 +0100

    Fix pylint consider-merging-isinstance

 pitivi/timeline/elements.py | 3 +--
 pitivi/titleeditor.py       | 3 +--
 pitivi/undo/timeline.py     | 6 ++----
 pitivi/utils/timeline.py    | 3 +--
 4 files changed, 5 insertions(+), 10 deletions(-)
---
diff --git a/pitivi/timeline/elements.py b/pitivi/timeline/elements.py
index d76df148..0044eb92 100644
--- a/pitivi/timeline/elements.py
+++ b/pitivi/timeline/elements.py
@@ -1274,8 +1274,7 @@ class Clip(Gtk.EventBox, Zoomable, Loggable):
             selection = [self.ges_clip]
         else:
             selection = [elem for elem in parent.get_children(True)
-                         if isinstance(elem, GES.SourceClip) or
-                         isinstance(elem, GES.TransitionClip)]
+                         if isinstance(elem, (GES.SourceClip, GES.TransitionClip))]
         self.timeline.selection.setSelection(selection, mode)
 
         return False
diff --git a/pitivi/titleeditor.py b/pitivi/titleeditor.py
index 871de9e0..7565840a 100644
--- a/pitivi/titleeditor.py
+++ b/pitivi/titleeditor.py
@@ -231,8 +231,7 @@ class TitleEditor(Loggable):
             self._children_props_handler = None
         self.source = None
         if source:
-            assert isinstance(source, GES.TextOverlay) or \
-                isinstance(source, GES.TitleSource)
+            assert isinstance(source, (GES.TextOverlay, GES.TitleSource))
             self._updateFromSource(source)
             self.source = source
             self.infobar.hide()
diff --git a/pitivi/undo/timeline.py b/pitivi/undo/timeline.py
index 191d4d42..ed60d658 100644
--- a/pitivi/undo/timeline.py
+++ b/pitivi/undo/timeline.py
@@ -72,8 +72,7 @@ class TrackElementPropertyChanged(UndoableAction):
         st['element-name'] = self.track_element.get_name()
         st['property'] = self.property_name
         value = self.new_value
-        if isinstance(self.new_value, GObject.GFlags) or\
-                isinstance(self.new_value, GObject.GEnum):
+        if isinstance(self.new_value, (GObject.GEnum, GObject.GFlags)):
             value = int(self.new_value)
 
         _, _, pspec = self.track_element.lookup_child(self.property_name)
@@ -730,8 +729,7 @@ class LayerObserver(MetaContainerObserver, Loggable):
                               self._control_binding_added_cb)
         track_element.connect("control-binding-removed",
                               self._control_binding_removed_cb)
-        if isinstance(track_element, GES.BaseEffect) or \
-                isinstance(track_element, GES.VideoSource):
+        if isinstance(track_element, (GES.BaseEffect, GES.VideoSource)):
             observer = TrackElementObserver(track_element, self.action_log)
             self.track_element_observers[track_element] = observer
 
diff --git a/pitivi/utils/timeline.py b/pitivi/utils/timeline.py
index 58bfffd7..cd3bf525 100644
--- a/pitivi/utils/timeline.py
+++ b/pitivi/utils/timeline.py
@@ -132,8 +132,7 @@ class Selection(GObject.Object, Loggable):
                     from pitivi.utils.ui import unset_children_state_recurse
                     unset_children_state_recurse(obj.ui, Gtk.StateFlags.SELECTED)
             for element in obj.get_children(False):
-                if isinstance(obj, GES.BaseEffect) or\
-                        isinstance(obj, GES.TextOverlay):
+                if isinstance(obj, (GES.BaseEffect, GES.TextOverlay)):
                     continue
                 element.selected.selected = selected
         self.set_can_group_ungroup()