fix-rdf-file: also add lt/gt to bad chars

ulo/fix-rdf-file.py

@@ -9,7 +9,7 @@ def fix_quoted(s: str) -> str:
     payload = s.strip('"')
 
     bad_chars = (
-            '|', '\\', ' ', '^'
+            '|', '\\', ' ', '^', '<', '>'
     )
 
     for c in bad_chars: