[bug] Syntax highlighting broken for multiline comments

[martin-ocasek]

When multiline comment is only partially shown in the diff view the rest of the code is colored as if being commented out, even though it isnt, increasing number of visible lines so that the whole comment block is visible fixes the highlighting issue in the view.

Tested on .ts file.

With default number of visible lines:

With increased number of visible lines

Version: sourcegit-2025.02.linux.amd64.AppImage

[aikawayataro]

See #552