Add --diff support for Jupyter notebooks

[dhruvmanila]

Depends on #1218

Similar to the diff produced for Python files, except here it'll be at cell level. If a cell contains an auto-fix add it to the output, otherwise ignore it.

black --diff . output:

--- site/en/guide/advanced_autodiff.ipynb	2023-05-30 07:24:16.776513 +0000:cell_1
+++ site/en/guide/advanced_autodiff.ipynb	2023-05-30 15:23:51.498900 +0000:cell_1
@@ -1,6 +1,6 @@
-#@title Licensed under the Apache License, Version 2.0 (the "License");
+# @title Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 # https://www.apache.org/licenses/LICENSE-2.0
 #
--- site/en/guide/advanced_autodiff.ipynb	2023-05-30 07:24:16.776513 +0000:cell_6
+++ site/en/guide/advanced_autodiff.ipynb	2023-05-30 15:23:51.498900 +0000:cell_6
@@ -1,6 +1,6 @@
 import tensorflow as tf
 
 import matplotlib as mpl
 import matplotlib.pyplot as plt
 
-mpl.rcParams['figure.figsize'] = (8, 6)
+mpl.rcParams["figure.figsize"] = (8, 6)
--- site/en/guide/advanced_autodiff.ipynb	2023-05-30 07:24:16.776513 +0000:cell_9
+++ site/en/guide/advanced_autodiff.ipynb	2023-05-30 15:23:51.498900 +0000:cell_9
@@ -1,13 +1,13 @@
 x = tf.Variable(2.0)
 y = tf.Variable(3.0)
 
 with tf.GradientTape() as t:
-  x_sq = x * x
-  with t.stop_recording():
-    y_sq = y * y
-  z = x_sq + y_sq
+    x_sq = x * x
+    with t.stop_recording():
+        y_sq = y * y
+    z = x_sq + y_sq
 
-grad = t.gradient(z, {'x': x, 'y': y})
+grad = t.gradient(z, {"x": x, "y": y})
 
-print('dz/dx:', grad['x'])  # 2*x => 4
-print('dz/dy:', grad['y'])
+print("dz/dx:", grad["x"])  # 2*x => 4
+print("dz/dy:", grad["y"])
would reformat site/en/guide/advanced_autodiff.ipynb

All done! ✨ 🍰 ✨
1 file would be reformatted.

ruff check --fix --diff . output:

--- src/EM101.py
+++ src/EM101.py
@@ -1,5 +1,4 @@
+msg = "This is an example exception. This message is very long and spans multiple lines."
 raise Exception(
-    "This is an example exception. "
-    "This message is very long "
-    "and spans multiple lines."
+    msg,
 )

--- src/RET504.py
+++ src/RET504.py
@@ -4,4 +4,5 @@
             x = 5
             return x
         case _:
-            raise ValueError("Error")
+            msg = "Error"
+            raise ValueError(msg)

--- src/RUF100.py
+++ src/RUF100.py
@@ -1,2 +1,2 @@
-import api.checks  # noqa: F401
+import api.checks
 import api.signals  # noqa: F401

--- src/PYI015.pyi
+++ src/PYI015.pyi
@@ -1,2 +1,2 @@
 unicode = str
-some = str()
+some = ""

--- src/D.py
+++ src/D.py
@@ -2,12 +2,12 @@
 
 
 class MyPublicClass:
-    def __init__(self):
+    def __init__(self) -> None:
         # This one should have a D107
         pass
 
 
 class MyPrivateClass:
-    def __init__(self):
+    def __init__(self) -> None:
         # This one should NOT have a D107
         pass

Would fix 77 errors.