Fix stuff?

mat2

@@ -88,7 +88,10 @@ def __print_meta(filename: str, metadata: dict, depth: int=1):
         # Remove control characters
         # We might use 'Cc' instead of 'C', but better safe than sorry
         # https://www.unicode.org/reports/tr44/#GC_Values_Table
-        v = ''.join(ch for ch in v if not unicodedata.category(ch).startswith('C'))
+        try:
+            v = ''.join(ch for ch in v if not unicodedata.category(ch).startswith('C'))
+        except TypeError:
+            pass  # for things that aren't iterable
 
         try:  # FIXME this is ugly.
             print(padding + "  %s: %s" % (k, v))