change ext to ext: for better filtering

Author: sujata-m

src/osm_osw_reformatter/serializer/osw/osw_normalizer.py

@@ -506,7 +506,7 @@ def _normalize(tags, keep_keys, defaults):
     new_tags.update(defaults)
 
     # Keep all tags that start with "ext"
-    ext_tags = {k: v for k, v in tags.items() if k.startswith("ext")}
+    ext_tags = {k: v for k, v in tags.items() if k.startswith("ext:")}
     new_tags.update(ext_tags)
 
     return new_tags

tests/unit_tests/test_osm2osw/test_osm2osw.py

@@ -85,7 +85,7 @@ async def run_test():
                         geojson = json.load(f)
                         for feature in geojson.get('features', []):
                             props = feature.get('properties', {})
-                            if any(k.startswith("ext") for k in props):
+                            if any(k.startswith("ext:") for k in props):
                                 has_ext_tag = True
                                 break
                     if has_ext_tag: