feat(md2doc): copy _bulletize helper from md2pdf (spec §3.3)

tests/test_bulletize.py

@@ -0,0 +1,30 @@
+"""Tests for _bulletize — verifies behavior copied from md2pdf.py."""
+from md2doc import _bulletize
+
+
+def test_simple_dash_list_becomes_bullets():
+    text = "- item A\n- item B\n"
+    result = _bulletize(text)
+    assert "• item A" in result
+    assert "• item B" in result
+
+
+def test_code_block_dashes_preserved():
+    """Dashes inside ``` blocks must NOT be bulletized."""
+    text = "```bash\n-r flag\n--verbose\n```\n"
+    result = _bulletize(text)
+    assert "-r flag" in result
+    assert "--verbose" in result
+
+
+def test_html_block_dashes_preserved():
+    """Dashes inside raw HTML blocks (table/div/etc.) must NOT be bulletized."""
+    text = "<table>\n- not a list\n</table>\n"
+    result = _bulletize(text)
+    assert "- not a list" in result
+
+
+def test_tilde_fence_also_preserved():
+    text = "~~~bash\n-x\n~~~\n"
+    result = _bulletize(text)
+    assert "-x" in result