Unoptimized file diff in jupyter notebooks

[bleamer]

Issue Type: Bug

File comparison between version on VSCode for Jupyter notebook can be improved.
Steps to reproduce:

• Modify a cell in Jupyter notebook
• Add 2-3 non-empty new cells below the modified cell
• Observe the diff does not align the earlier modified cell correctly and tried to compare with newly added cell.

IN contrast nbdiff-web is able to catch this difference.

VS Code version: Code 1.65.0 (Universal) (b5205cc, 2022-03-02T11:11:20.886Z)
OS version: Darwin x64 20.6.0
Restricted Mode: No

Extensions (16)

Extension	Author (truncated)	Version
jupyter-keymap	ms-	1.0.0
remote-containers	ms-	0.224.2
remote-ssh	ms-	0.76.1
remote-wsl	ms-	0.64.2
vscode-remote-extensionpack	ms-	0.21.0
gitlens	eam	12.0.1
gitkraken-authentication	git	1.0.3
python-resource-monitor	kai	0.1.9
json-table-viewer	len	0.0.4
rainbow-csv	mec	2.0.0
python	ms-	2022.2.1924087327
vscode-pylance	ms-	2022.3.0
jupyter	ms-	2022.2.1020642448
jupyter-keymap	ms-	1.0.0
jupyter-renderers	ms-	1.0.6
vscode-progressive-increment	nar	1.0.3

[rebornix]

/duplicate of #133645