Fix Shadow Line translation line endings

tests/umu_backend_tests.sh

@@ -98,7 +98,23 @@ test_run_umu_game_uses_converted_path() {
     assert_file_contains "$UMU_STUB_LOG" "${WINEPREFIX}|shadow-line|none|${WINEPREFIX}/drive_c/Program Files (x86)/GalaxyLaboratory/ShadowRine_FullVoice/play_sr.exe" "UMU launches converted exe path"
 }
 
+test_install_crlf_file_normalizes_line_endings() {
+    local sourceFile="${testRoot}/language_en.dat"
+    local destFile="${testRoot}/installed/language_en.dat"
+    local expectedFile="${testRoot}/expected-language_en.dat"
+    printf 'line one\nline two\n' > "$sourceFile"
+    printf 'line one\r\nline two\r\n' > "$expectedFile"
+
+    install_crlf_file "$sourceFile" "$destFile"
+
+    if ! cmp -s "$expectedFile" "$destFile"; then
+        printf 'FAIL: Translation file is installed with CRLF line endings\n' >&2
+        exit 1
+    fi
+}
+
 test_get_umu_bottle_sets_environment
 test_add_umu_launcher_records_backend_and_game_id
 test_run_umu_game_uses_converted_path
+test_install_crlf_file_normalizes_line_endings
 printf 'UMU backend tests passed\n'