Restore three tests that only fail on Windows in CI

[mikaelvesavuori]

A small number of tests seem to fail exclusively on Windows CI builds:

• getFileContentAndPath.test.ts
• prepFile.test.ts
• getSvgFileData.test.ts

This might have to do with CRLF or some similar "invisible" problems?

Successfully resolving this would make the tests accurately pass on all test platforms (Ubuntu, Windows...Mac?).