fix: keep the gap report readable

scripts/cross_reference.py

@@ -668,10 +668,15 @@ def cross_reference(
     return report
 
 
-def print_report(report: dict) -> None:
-    """Print a human-readable gap analysis report."""
+def print_report(report: dict, scope: str = "all emulators") -> None:
+    """Print a human-readable gap analysis report.
+
+    `scope` names what the totals cover: under --platform, the emulators
+    that platform runs, not all of them.
+    """
     print("Emulator vs Platform Gap Analysis")
     print("=" * 60)
+    print("* marks a file the emulator requires")
 
     total_gaps = 0
     totals: dict[str, int] = {"bios": 0, "data": 0, "large_file": 0, "missing": 0}
@@ -688,7 +693,8 @@ def print_report(report: dict) -> None:
                 parts.append(f"{count} {key}")
         status = ", ".join(parts) if parts else "OK"
 
-        print(f"\n{data['emulator']} ({', '.join(data['systems'])})")
+        systems = ", ".join(data["systems"])
+        print(f"\n{data['emulator']}" + (f" ({systems})" if systems else ""))
         print(
             f"  {data['total_files']} files in profile, "
             f"{data['platform_covered']} declared by platforms, "
@@ -699,7 +705,9 @@ def print_report(report: dict) -> None:
         for g in data["gap_details"]:
             req = "*" if g["required"] else " "
             src = g.get("source", "missing").upper()
-            note = f" -- {g['note']}" if g["note"] else ""
+            # One line per file: a note spanning lines fell to column 0
+            # between entries and read as an emulator heading.
+            note = f": {' '.join(str(g['note']).split())}" if g["note"] else ""
             archive_info = ""
             if g.get("archive"):
                 fc = g.get("archive_file_count", 0)
@@ -712,7 +720,7 @@ def print_report(report: dict) -> None:
             totals[key] += data.get(f"gap_{key}", 0)
 
     print(f"\n{'=' * 60}")
-    print(f"Total: {total_gaps} undeclared files across all emulators")
+    print(f"Total: {total_gaps} undeclared files across {scope}")
     available = totals["bios"] + totals["data"] + totals["large_file"]
     print(f"  {available} available (bios: {totals['bios']}, data: {totals['data']}, "
           f"large_file: {totals['large_file']})")
@@ -772,7 +780,10 @@ def main():
     if args.json:
         print(json.dumps(report, indent=2))
     else:
-        print_report(report)
+        print_report(
+            report,
+            f"the emulators {args.platform} runs" if args.platform else "all emulators",
+        )
 
 
 if __name__ == "__main__":

tests/test_audit_regressions.py

@@ -3544,5 +3544,30 @@ class VerifyPacksSaysWhatItExcluded(unittest.TestCase):
         self.assertNotRegex(body, r"result\[\d\]")
 
 
+
+class TheGapReportKeepsItsShape(unittest.TestCase):
+    """Multi-line notes fell to column 0 and read as emulator headings, a
+    profile without systems printed `Abuse ()`, `*` had no legend, and
+    --platform totals said "across all emulators"."""
+
+    def test_layout(self):
+        from scripts.cross_reference import print_report
+
+        report = {"abuse": {
+            "emulator": "Abuse", "systems": [], "gaps": 1, "total_files": 1,
+            "platform_covered": 0, "gap_missing": 1,
+            "gap_details": [{"name": "a.spe", "required": True, "source": "missing",
+                             "note": "first line\nsecond line"}],
+        }}
+        out = io.StringIO()
+        with contextlib.redirect_stdout(out):
+            print_report(report, "the emulators batocera runs")
+        text = out.getvalue()
+        self.assertIn("* marks a file the emulator requires", text)
+        self.assertIn("\nAbuse\n", text)
+        self.assertIn("a.spe [MISSING]: first line second line", text)
+        self.assertIn("across the emulators batocera runs", text)
+
+
 if __name__ == "__main__":
     unittest.main()