cmake/Tests: split long line

cmake/Tests.cmake

@@ -57,7 +57,14 @@ endif()
 add_custom_target(fish_run_tests
   # TODO: This should be replaced with a unified solution, possibly build_tools/check.sh.
   COMMAND ${CMAKE_SOURCE_DIR}/tests/test_driver.py ${max_concurrency_flag} ${CMAKE_CURRENT_BINARY_DIR}
-  COMMAND env ${VARS_FOR_CARGO} ${Rust_CARGO} test --no-default-features ${CARGO_FLAGS} --workspace --target-dir ${rust_target_dir} ${cargo_test_flags}
+  COMMAND env ${VARS_FOR_CARGO}
+            ${Rust_CARGO}
+            test
+            --no-default-features
+            ${CARGO_FLAGS}
+            --workspace
+            --target-dir ${rust_target_dir}
+            ${cargo_test_flags}
   WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
   DEPENDS fish fish_indent fish_key_reader fish_test_helper
   USES_TERMINAL