Pass individual flags to executable

E.g., pass ["-foo", "-bar"] instead of "-foo -bar".

INCHI-1-TEST/tests/test_executable/conftest.py

@@ -24,7 +24,7 @@ def _run_inchi_exe(
             raise FileNotFoundError(f"InChI executable not found at {exe_path}.")
 
         return subprocess.run(
-            [exe_path, molfile_path, args],
+            [exe_path, molfile_path] + args.split(),
             capture_output=True,
             text=True,
         )