diff --git a/operators/mouse_cut.py b/operators/mouse_cut.py
index 57664010..3136b848 100644
--- a/operators/mouse_cut.py
+++ b/operators/mouse_cut.py
@@ -12,7 +12,6 @@
 from .utils.draw import draw_line, draw_arrow_head, get_color_gizmo_primary
 from .utils.doc import doc_name, doc_idname, doc_brief, doc_description
 
-
 if not bpy.app.background:
     SHADER = gpu.shader.from_builtin("2D_UNIFORM_COLOR")
 
@@ -344,28 +343,17 @@ def draw(
 
     bgl.glLineWidth(3)
     draw_line(SHADER, start, end, color)
-    draw_line(SHADER, Vector((start.x, min_bottom)), Vector(
-        (start.x, max_top)), color)
-    draw_line(SHADER, Vector((end.x, min_bottom)), Vector((end.x, max_top)),
-              color)
+    draw_line(SHADER, Vector((start.x, min_bottom)), Vector((start.x, max_top)), color)
+    draw_line(SHADER, Vector((end.x, min_bottom)), Vector((end.x, max_top)), color)
 
     if draw_arrows:
-        first_arrow_center = Vector(
-            [start.x + ((end.x - start.x) * 0.25), start.y])
-        second_arrow_center = Vector(
-            [end.x - ((end.x - start.x) * 0.25), start.y])
+        first_arrow_center = Vector([start.x + ((end.x - start.x) * 0.25), start.y])
+        second_arrow_center = Vector([end.x - ((end.x - start.x) * 0.25), start.y])
         arrow_size = Vector([10, 20])
 
         bgl.glLineWidth(6)
-        draw_arrow_head(SHADER,
-                        first_arrow_center,
-                        arrow_size,
-                        color=color)
-        draw_arrow_head(SHADER,
-                        second_arrow_center,
-                        arrow_size,
-                        points_right=False,
-                        color=color)
+        draw_arrow_head(SHADER, first_arrow_center, arrow_size, color=color)
+        draw_arrow_head(SHADER, second_arrow_center, arrow_size, points_right=False, color=color)
 
     bgl.glLineWidth(1)
     bgl.glDisable(bgl.GL_BLEND)
diff --git a/operators/mouse_trim.py b/operators/mouse_trim.py
index 12f0deab..26d3e078 100644
--- a/operators/mouse_trim.py
+++ b/operators/mouse_trim.py
@@ -112,7 +112,6 @@ def invoke(self, context, event):
         else:
             context.scene.frame_current = self.frame_start if self.frame_start else frame
 
-
         # FIXME: Workaround Blender 2.80's audio bug, remove when fixed in Blender
         for s in bpy.context.sequences:
             if s.lock:
diff --git a/operators/utils/draw.py b/operators/utils/draw.py
index 8af36438..7afa9d93 100644
--- a/operators/utils/draw.py
+++ b/operators/utils/draw.py
@@ -40,34 +40,33 @@ def draw_line(shader, start, end, color=(1.0, 1.0, 1.0, 1.0)):
 
 
 def draw_rectangle(shader, origin, size, color=(1.0, 1.0, 1.0, 1.0)):
-    vertices = ((origin.x, origin.y), (origin.x + size.x, origin.y),
-                (origin.x, origin.y + size.y), (origin.x + size.x,
-                                                origin.y + size.y))
+    vertices = (
+        (origin.x, origin.y),
+        (origin.x + size.x, origin.y),
+        (origin.x, origin.y + size.y),
+        (origin.x + size.x, origin.y + size.y),
+    )
     indices = ((0, 1, 2), (2, 1, 3))
-    batch = batch_for_shader(shader,
-                             'TRIS', {"pos": vertices},
-                             indices=indices)
+    batch = batch_for_shader(shader, "TRIS", {"pos": vertices}, indices=indices)
     shader.bind()
-    shader.uniform_float('color', color)
+    shader.uniform_float("color", color)
     batch.draw(shader)
 
 
 def draw_triangle(point_1, point_2, point_3, color=(1.0, 1.0, 1.0, 1.0)):
     vertices = (point_1, point_2, point_3)
-    indices = ((0, 1, 2), )
-    shader = gpu.shader.from_builtin('2D_UNIFORM_COLOR')
-    batch = batch_for_shader(shader,
-                             'TRIS', {"pos": vertices},
-                             indices=indices)
+    indices = ((0, 1, 2),)
+    shader = gpu.shader.from_builtin("2D_UNIFORM_COLOR")
+    batch = batch_for_shader(shader, "TRIS", {"pos": vertices}, indices=indices)
     shader.bind()
-    shader.uniform_float('color', color)
+    shader.uniform_float("color", color)
     batch.draw(shader)
 
 
-def draw_text(x, y, size, text, justify='left', color=(1.0, 1.0, 1.0, 1.0)):
+def draw_text(x, y, size, text, justify="left", color=(1.0, 1.0, 1.0, 1.0)):
     font_id = 0
     blf.color(font_id, *color)
-    if justify == 'right':
+    if justify == "right":
         text_width, text_height = blf.dimensions(font_id, text)
     else:
         text_width = 0
@@ -76,11 +75,7 @@ def draw_text(x, y, size, text, justify='left', color=(1.0, 1.0, 1.0, 1.0)):
     blf.draw(font_id, text)
 
 
-def draw_arrow_head(shader,
-                    center,
-                    size,
-                    points_right=True,
-                    color=(1.0, 1.0, 1.0, 1.0)):
+def draw_arrow_head(shader, center, size, points_right=True, color=(1.0, 1.0, 1.0, 1.0)):
     """
     Draws a triangular arrow using two Vectors:
     - the triangle's center
@@ -88,11 +83,9 @@ def draw_arrow_head(shader,
     """
     direction = 1 if points_right else -1
 
-    point_upper = Vector(
-        [center.x - size.x / 2 * direction, center.y + size.y / 2])
+    point_upper = Vector([center.x - size.x / 2 * direction, center.y + size.y / 2])
     point_tip = Vector([center.x + size.x / 2 * direction, center.y])
-    point_lower = Vector(
-        [center.x - size.x / 2 * direction, center.y - size.y / 2])
+    point_lower = Vector([center.x - size.x / 2 * direction, center.y - size.y / 2])
 
     draw_line(shader, point_upper, point_tip, color)
     draw_line(shader, point_tip, point_lower, color)