Make undefined Unicode characters show up in a nicer way in braille.

third_party/liblouis/liblouis_list_tables.py

Index: third_party/liblouis/liblouis_list_tables.py
diff --git a/third_party/liblouis/liblouis_list_tables.py b/third_party/liblouis/liblouis_list_tables.py
index e42e5daee21b3fc0224d8740049000371acf4542..fd05c555671436a5bbfc6f719a7fd77d2abc419a 100755
--- a/third_party/liblouis/liblouis_list_tables.py
+++ b/third_party/liblouis/liblouis_list_tables.py
@@ -66,7 +66,9 @@ def DoMain(argv):
   parser.prog = 'liblouis_list_tables'
   parser.set_usage('usage: %prog [options] listfile')
   parser.add_option('-D', '--directory', dest='directories',
-                    action='append', help='Where to search for table files')
+                     action='append', help='Where to search for table files')
+  parser.add_option('-e', '--extra_file', dest='extra_files', action='append',
+                    default=[], help='Extra liblouis table file to process')
   (options, args) = parser.parse_args(argv)
 
   if len(args) != 1:
@@ -78,6 +80,8 @@ def DoMain(argv):
   output_set = set()
   for table in tables:
     ProcessFile(output_set, table['fileName'], options.directories)
+  for name in options.extra_files:
+    ProcessFile(output_set, name, options.directories)
   return '\n'.join(output_set)