feat: commit the corrected file of each platform

exports/ now holds the twelve platforms' own files, corrected, with a
report of every change, read by the site's corrected files page. Two
summaries are reworded for the page: an addition the format cannot
carry is counted as left out, and RetroPie names each skipped package
by sentence instead of joining reasons with semicolons. Its parser no
longer reads "e.g" as a file name.

tests/test_export_report.py

@@ -104,5 +104,25 @@ class CorrectedFilesPage(unittest.TestCase):
         self.assertIn('"exports/**"', workflow)
 
 
+class SummariesReadAsSentences(unittest.TestCase):
+    """The page shows each run's summary. RetroPie's joined its parts with
+    semicolons and read fs-uae's "(e.g, kick13.rom)" as two file names."""
+
+    def test_an_abbreviation_is_not_a_file_name(self):
+        from exporter.retropie_exporter import Exporter as RetroPieExporter
+
+        names = RetroPieExporter._listed("BIOS files (e.g, kick13.rom) i.e. Kickstart")
+        self.assertEqual(names, {"kick13.rom"})
+
+    def test_retropie_outcome_has_no_semicolon(self):
+        from exporter.retropie_exporter import Exporter as RetroPieExporter
+
+        exporter = RetroPieExporter()
+        exporter._skipped = {"names no file to extend": ["fs-uae", "amiberry"]}
+        text = exporter.outcome({}, {"a.sh": ""})
+        self.assertNotIn(";", text)
+        self.assertIn("amiberry, fs-uae: names no file to extend", text)
+
+
 if __name__ == "__main__":
     unittest.main()