From ae9a92c2be7ed4925bb8540d5643f46bef1b5cd3 Mon Sep 17 00:00:00 2001
From: Grant Sanderson <grant@3blue1brown.com>
Date: Wed, 19 Sep 2018 10:49:59 -0700
Subject: [PATCH 1/2] Small formating

---
 utils/space_ops.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/utils/space_ops.py b/utils/space_ops.py
index b0c6efdd..dfb049fd 100644
--- a/utils/space_ops.py
+++ b/utils/space_ops.py
@@ -43,7 +43,10 @@ def quaternion_conjugate(quaternion):
 def rotate_vector(vector, angle, axis=OUT):
     quat = quaternion_from_angle_axis(angle, axis)
     quat_inv = quaternion_conjugate(quat)
-    product = reduce(quaternion_mult, [quat, np.append(0, vector), quat_inv])
+    product = reduce(
+        quaternion_mult,
+        [quat, np.append(0, vector), quat_inv]
+    )
     return product[1:]
 
 

From c2e42c4281a660410e797ee4d12f524fb72f7701 Mon Sep 17 00:00:00 2001
From: Grant Sanderson <grant@3blue1brown.com>
Date: Wed, 19 Sep 2018 10:50:18 -0700
Subject: [PATCH 2/2] Quaternion thumbnail edit

---
 active_projects/quaternions.py | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/active_projects/quaternions.py b/active_projects/quaternions.py
index 484e4447..70accdb4 100644
--- a/active_projects/quaternions.py
+++ b/active_projects/quaternions.py
@@ -6496,20 +6496,22 @@ class ThumbnailP2(ThumbnailP1):
 
 class ThumbnailOverlay(Scene):
     def construct(self):
-        title = TextMobject("Quaternions")
-        title.set_width(8)
-        title.to_edge(UP)
+        title = TextMobject("Quaternions \\\\", "visualized")
+        title.set_width(7)
+        # title[1].scale(0.7, about_edge=UP)
+        title.to_edge(UP, buff=MED_SMALL_BUFF)
         v_line = Line(DOWN, UP)
         v_line.set_height(FRAME_HEIGHT)
 
         title.set_background_stroke(color=BLACK, width=1)
 
-        rect = BackgroundRectangle(title[4:6])
-        rect.set_fill(opacity=1)
-        rect.stretch(0.9, 0)
-        rect.stretch(1.1, 1)
-        title.add_to_back(BackgroundRectangle(title[0]))
-        title.add_to_back(rect)
+        for part in (title[0][4:6], title[1][4:5]):
+            rect = BackgroundRectangle(part)
+            rect.set_fill(opacity=1)
+            rect.stretch(0.9, 0)
+            rect.stretch(1.1, 1)
+            title.add_to_back(rect)
+        # title.add_to_back(BackgroundRectangle(title[0]))
 
         arrow = Arrow(LEFT, RIGHT)
         arrow.scale(1.5)