commit b32d61d7d6c9103e2b3f8f59adb5be70562a2daf
Author: Daniel Swanson <popcorn.tomato.dude@gmail.com>
Date:   Fri May 21 11:54:43 2021 -0500

    lists are unhashable in python

diff --git a/scripts/apertium-editdist b/scripts/apertium-editdist
index 8e30d82..941aefc 100755
--- a/scripts/apertium-editdist
+++ b/scripts/apertium-editdist
@@ -101,8 +101,8 @@ class Transducer:
                     except:
                         parse_error('Unable to parse weight', i)
                     if ',' in line:
-                        frompair = l.split(',')
-                        topair = r.split(',')
+                        frompair = tuple(l.split(','))
+                        topair = tuple(r.split(','))
                         if not (len(frompair) == len(topair) == 2):
                             parse_error('Swap-specification has wrong number of comma separators', i)
                         self.swaps.setdefault((frompair, topair), weight)