Preserve escaped backslash-newline text in UsePortableNewlines - #1006

No file matched to [/home/runner/work/rewrite-static-analysis/rewrite-static-analysis/**/*requirements*.txt,/home/runner/work/rewrite-static-analysis/rewrite-static-analysis/**/*requirements*.in,/home/runner/work/rewrite-static-analysis/rewrite-static-analysis/**/*constraints*.txt,/home/runner/work/rewrite-static-analysis/rewrite-static-analysis/**/*constraints*.in,/home/runner/work/rewrite-static-analysis/rewrite-static-analysis/**/pyproject.toml,/home/runner/work/rewrite-static-analysis/rewrite-static-analysis/**/uv.lock,/home/runner/work/rewrite-static-analysis/rewrite-static-analysis/**/*.py.lock]. The cache will never get invalidated. Make sure you have checked out the target repository and configured the cache-dependency-glob input correctly.