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

hscommon/desktop.py

@@ -9,25 +9,30 @@
 import os.path as op
 import logging
 
+
 class SpecialFolder:
     AppData = 1
     Cache = 2
 
+
 def open_url(url):
     """Open ``url`` with the default browser.
     """
     _open_url(url)
 
+
 def open_path(path):
     """Open ``path`` with its associated application.
     """
     _open_path(str(path))
 
+
 def reveal_path(path):
     """Open the folder containing ``path`` with the default file browser.
     """
     _reveal_path(str(path))
 
+
 def special_folder_path(special_folder, appname=None):
     """Returns the path of ``special_folder``.
 
@@ -38,12 +43,14 @@ def special_folder_path(special_folder, appname=None):
     """
     return _special_folder_path(special_folder, appname)
 
+
 try:
     # Normally, we would simply do "from cocoa import proxy", but due to a bug in pytest (currently
     # at v2.4.2), our test suite is broken when we do that. This below is a workaround until that
     # bug is fixed.
     import cocoa
-    if not hasattr(cocoa, 'proxy'):
+
+    if not hasattr(cocoa, "proxy"):
         raise ImportError()
     proxy = cocoa.proxy
     _open_url = proxy.openURL_
@@ -56,13 +63,15 @@ try:
         else:
             base = proxy.getAppdataPath()
         if not appname:
-            appname = proxy.bundleInfo_('CFBundleName')
+            appname = proxy.bundleInfo_("CFBundleName")
         return op.join(base, appname)
 
+
 except ImportError:
     try:
         from PyQt5.QtCore import QUrl, QStandardPaths
         from PyQt5.QtGui import QDesktopServices
+
         def _open_url(url):
             QDesktopServices.openUrl(QUrl(url))
 
@@ -79,10 +88,12 @@ except ImportError:
             else:
                 qtfolder = QStandardPaths.DataLocation
             return QStandardPaths.standardLocations(qtfolder)[0]
+
     except ImportError:
         # We're either running tests, and these functions don't matter much or we're in a really
         # weird situation. Let's just have dummy fallbacks.
         logging.warning("Can't setup desktop functions!")
+
         def _open_path(path):
             pass
 
@@ -90,4 +101,4 @@ except ImportError:
             pass
 
         def _special_folder_path(special_folder, appname=None):
-            return '/tmp'
+            return "/tmp"