Format files with black

- Format all files with black
- Update tox.ini flake8 arguments to be compatible
- Add black to requirements-extra.txt
- Reduce ignored flake8 rules and fix a few violations

core/gui/details_panel.py

@@ -9,6 +9,7 @@
 from hscommon.gui.base import GUIObject
 from .base import DupeGuruGUIObject
 
+
 class DetailsPanel(GUIObject, DupeGuruGUIObject):
     def __init__(self, app):
         GUIObject.__init__(self, multibind=True)
@@ -19,7 +20,7 @@ class DetailsPanel(GUIObject, DupeGuruGUIObject):
         self._refresh()
         self.view.refresh()
 
-    #--- Private
+    # --- Private
     def _refresh(self):
         if self.app.selected_dupes:
             dupe = self.app.selected_dupes[0]
@@ -31,18 +32,19 @@ class DetailsPanel(GUIObject, DupeGuruGUIObject):
         # we don't want the two sides of the table to display the stats for the same file
         ref = group.ref if group is not None and group.ref is not dupe else None
         data2 = self.app.get_display_info(ref, group, False)
-        columns = self.app.result_table.COLUMNS[1:] # first column is the 'marked' column
+        columns = self.app.result_table.COLUMNS[
+            1:
+        ]  # first column is the 'marked' column
         self._table = [(c.display, data1[c.name], data2[c.name]) for c in columns]
 
-    #--- Public
+    # --- Public
     def row_count(self):
         return len(self._table)
 
     def row(self, row_index):
         return self._table[row_index]
 
-    #--- Event Handlers
+    # --- Event Handlers
     def dupes_selected(self):
         self._refresh()
         self.view.refresh()
-