Fix rule/fact name parser for test case without parentheses on the RHS.

Author: Neumann, Jan

src/compute_graph_vectorize/facts/parser.py

@@ -205,7 +205,7 @@ def parse_rule_or_fact(rule: str) -> Rule | Fact:
                 else:
                     raise ValueError()
             elif state == 2:
-                _fact = _parse_fact(tokens_iter)
+                _fact = _parse_fact(tokens_iter, is_rule_rhs=True)
                 rhs.append(_fact)
                 state = 3
             elif state == 3:

tests/test_rule_fact_name_parser.py

@@ -15,6 +15,7 @@
     ("predict", "predict"),
     ("{10, 7} atom_embed(X) :- node_feature(X). [transformation=identity]", "atom_embed"),
     ("{10, 10} l2_embed(X) :- l1_embed(X). [transformation=identity]", "l2_embed"),
+    ("{1, 8} xor :- {8, 2} xy. [transformation=tanh]", "xor")
 ]