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/deletion_options.py

@@ -1,8 +1,8 @@
 # Created On: 2012-05-30
 # Copyright 2015 Hardcoded Software (http://www.hardcoded.net)
-# 
-# This software is licensed under the "GPLv3" License as described in the "LICENSE" file, 
-# which should be included with this package. The terms are also available at 
+#
+# This software is licensed under the "GPLv3" License as described in the "LICENSE" file,
+# which should be included with this package. The terms are also available at
 # http://www.gnu.org/licenses/gpl-3.0.html
 
 import os
@@ -10,42 +10,46 @@ import os
 from hscommon.gui.base import GUIObject
 from hscommon.trans import tr
 
+
 class DeletionOptionsView:
     """Expected interface for :class:`DeletionOptions`'s view.
-    
+
     *Not actually used in the code. For documentation purposes only.*
-    
+
     Our view presents the user with an appropriate way (probably a mix of checkboxes and radio
     buttons) to set the different flags in :class:`DeletionOptions`. Note that
     :attr:`DeletionOptions.use_hardlinks` is only relevant if :attr:`DeletionOptions.link_deleted`
     is true. This is why we toggle the "enabled" state of that flag.
-    
+
     We expect the view to set :attr:`DeletionOptions.link_deleted` immediately as the user changes
     its value because it will toggle :meth:`set_hardlink_option_enabled`
-    
+
     Other than the flags, there's also a prompt message which has a dynamic content, defined by
     :meth:`update_msg`.
     """
+
     def update_msg(self, msg: str):
         """Update the dialog's prompt with ``str``.
         """
-    
+
     def show(self):
         """Show the dialog in a modal fashion.
-        
+
         Returns whether the dialog was "accepted" (the user pressed OK).
         """
-    
+
     def set_hardlink_option_enabled(self, is_enabled: bool):
         """Enable or disable the widget controlling :attr:`DeletionOptions.use_hardlinks`.
         """
 
+
 class DeletionOptions(GUIObject):
     """Present the user with deletion options before proceeding.
-    
+
     When the user activates "Send to trash", we present him with a couple of options that changes
     the behavior of that deletion operation.
     """
+
     def __init__(self):
         GUIObject.__init__(self)
         #: Whether symlinks or hardlinks are used when doing :attr:`link_deleted`.
@@ -54,10 +58,10 @@ class DeletionOptions(GUIObject):
         #: Delete dupes directly and don't send to trash.
         #: *bool*. *get/set*
         self.direct = False
-    
+
     def show(self, mark_count):
         """Prompt the user with a modal dialog offering our deletion options.
-        
+
         :param int mark_count: Number of dupes marked for deletion.
         :rtype: bool
         :returns: Whether the user accepted the dialog (we cancel deletion if false).
@@ -69,7 +73,7 @@ class DeletionOptions(GUIObject):
         msg = tr("You are sending {} file(s) to the Trash.").format(mark_count)
         self.view.update_msg(msg)
         return self.view.show()
-    
+
     def supports_links(self):
         """Returns whether our platform supports symlinks.
         """
@@ -87,21 +91,19 @@ class DeletionOptions(GUIObject):
         except TypeError:
             # wrong number of arguments
             return True
-    
+
     @property
     def link_deleted(self):
         """Replace deleted dupes with symlinks (or hardlinks) to the dupe group reference.
-        
+
         *bool*. *get/set*
-        
+
         Whether the link is a symlink or hardlink is decided by :attr:`use_hardlinks`.
         """
         return self._link_deleted
-    
+
     @link_deleted.setter
     def link_deleted(self, value):
         self._link_deleted = value
         hardlinks_enabled = value and self.supports_links()
         self.view.set_hardlink_option_enabled(hardlinks_enabled)
-    
-