v0.3.2: add Ph.D./M.D./M.B.A. abbreviation tests

tests/test_evidence_spans.py

@@ -106,3 +106,23 @@ class TestAbbreviationHandling:
         spans = split_evidence(text)
         assert len(spans) == 2
         assert "Dr. Elena Vasquez" in spans[0].text
+
+    def test_phd_abbreviation(self):
+        text = "Dr. Sarah Chen, Ph.D., reported the findings. The patient recovered."
+        spans = split_evidence(text)
+        assert len(spans) == 2
+        assert "Ph.D." in spans[0].text
+
+    def test_md_abbreviation(self):
+        text = "Jane Smith, M.D., performed surgery. She was assisted by a nurse."
+        spans = split_evidence(text)
+        assert len(spans) == 2
+        assert "M.D." in spans[0].text
+
+    def test_mba_and_bs_abbreviations(self):
+        text = "John holds an M.B.A. and a B.S. He is now a VP. They work at a firm."
+        spans = split_evidence(text)
+        # VP. is NOT an abbreviation, so it splits. M.B.A. and B.S. are protected.
+        assert len(spans) >= 2
+        assert "M.B.A." in spans[0].text
+        assert "B.S." in spans[0].text