gpui: Fix `shape_text` split to support \r\n (#31022)
Jason Lee
created
Release Notes:
- N/A
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Today I check the shape_text result on Windows, I get:
<img width="409" alt="屏幕截图 2025-05-20 222908"
src="https://github.com/user-attachments/assets/3ee93911-3de1-4e01-9433-00c626fc2369"
/>
Here the `shape_text` split logic I think it should use `lines` method,
not `split('\n')`, the newline on Windows is `\r\n`.