Fix PIS file formatting

src/pis_file.py

@@ -5,6 +5,7 @@ def create_new_pis_file(input):
     file_content = "# File produced by DGP2\n\nFor Review before merging\nXXXX\n\n"
     for train in input:
         file_content += f"""\n
+pis:
   - code: {train.get('diagram_pis_code', 'N/A')}
     # diagramDate: {train.get('diagram_date', 'N/A')}
     # diagramHeadcode: {train.get('train_headcode', 'N/A')}
@@ -13,7 +14,7 @@ def create_new_pis_file(input):
 """
         for entry in train.get('timetable_entries', []):
             file_content += f"""
-  stops: {",".join(stop.lower() for stop in entry.get('stops', []))}
+    stops: [{",".join(stop.lower() for stop in entry.get('stops', []))}]
   # stpIndicator: {entry.get('stpIndicator', 'N/A')}
   # trainUid: {entry.get('trainUid', 'N/A')}
   # scheduleStart: {entry.get('scheduleStart', 'N/A')}