Merge branch 'wip/jtojnar/black'

This branch was already squash-merged in 7c36fe2.

Merging it again so that individual commits are preserved for Git archaelogy.

gui/brushmanager.py

@@ -860,10 +860,10 @@ def export_group(self, group, filename):
 
         """
         brushes = self.get_group_brushes(group)
-        order_conf = b'Group: %s\n' % utf8(group)
+        order_conf = b"Group: %s\n" % utf8(group)
         with zipfile.ZipFile(
             filename,
-            mode='w',
+            mode="w",
             strict_timestamps=False,
         ) as zf:
             for brush in brushes:

lib/strokemap.py

@@ -410,7 +410,7 @@ class _Tile:
 
     """
 
-    _ZDATA_ONES = zlib.compress(np.ones((N, N), 'uint8').tobytes())
+    _ZDATA_ONES = zlib.compress(np.ones((N, N), "uint8").tobytes())
 
     def __init__(self):
         """Initialize, as a tile filled with all ones."""

tests/unported/performance.py

@@ -453,12 +453,8 @@ def memory_after_startup(gui):
         sys.exit(1)
 
     if options.show_profile:
-        gprof2dot = "gprof2dot.py" \
-            if shutil.which("gprof2dot.py") \
-            else "gprof2dot"
-        viewer = "feh" \
-            if shutil.which("feh") \
-            else "eog"
+        gprof2dot = "gprof2dot.py" if shutil.which("gprof2dot.py") else "gprof2dot"
+        viewer = "feh" if shutil.which("feh") else "eog"
         # FIXME: use gui.profiling's improved code somehow
         os.system(
             "%s -f pstats tmp.pstats | dot -Tpng -o tmp.png && %s tmp.png"