Adds blank lines when using CRLF line endings (i.e. on Windows)

[malinges]

This extension seems to struggle with files using CRLF line endings.
Each formatting adds a new blank line to every block of blank lines.
Switching to LF line endings seems to be the only workaround for this issue.

[DanielPerssonProos]

I can verify that this is still an issue in Windows. Please fix!