fix include flags in genscript test suite

tests/generator_scripts/test_generator_scripts.py

@@ -24,7 +24,12 @@ PYSTENCILS_RT_INCLUDE_PATH = get_pystencils_include_path()
 TEST_INDEX = THIS_DIR / "index.yaml"
 SOURCE_DIR = THIS_DIR / "source"
 EXPECTED_DIR = THIS_DIR / "expected"
-CXX_INCLUDE_FLAGS = ["-I", f"{DEPS_DIR}/{MDSPAN_QUAL_PATH},{PYSTENCILS_RT_INCLUDE_PATH}"]
+CXX_INCLUDE_FLAGS = [
+    "-I",
+    f"{DEPS_DIR}/{MDSPAN_QUAL_PATH}",
+    "-I",
+    PYSTENCILS_RT_INCLUDE_PATH,
+]
 
 
 def prepare_deps():