From 2508b90ce991e9217240db93479a5ff4788999c4 Mon Sep 17 00:00:00 2001
From: John Mager <jmageriii@gmail.com>
Date: Sun, 21 Jun 2020 03:31:23 +0000
Subject: [PATCH] Fixes bug in potentially cyclic ligatures

 * fixes issue #133
---
 Scripts/features.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Scripts/features.py b/Scripts/features.py
index 6117c2d..38c9583 100644
--- a/Scripts/features.py
+++ b/Scripts/features.py
@@ -53,6 +53,12 @@ def rule(liga):
         ignore(head=liga[0], suffix=(liga[1:] + [liga[-1]])),
     ]
 
+    # careful with repeats:
+    # #133 ->->->->, /**/**/**/, etc.
+    if len(liga) > 2 and liga[0] == liga[-1]:
+        rules.append(ignore([liga[-2]], liga[0], liga[1:]))
+        rules.append(ignore(head=liga[0], suffix=(liga[1:] + [liga[1]])))
+
     # hardcoded ignores, i.e. `<||>`
     rules.extend(ignores[tuple(liga)])