fix: handle transparent zero-width ligatures

Author: tonyfettes

scripts/unicode.py

@@ -1768,10 +1768,10 @@ def emit_module(
             } else if cp > end {
                 low = mid + 1
             } else {
-                return true
+                return false
             }
         }
-        false
+        true
     }
 }
 

tables.mbt

@@ -1138,10 +1138,10 @@ fn is_transparent_zero_width(c : Char) -> Bool {
       } else if cp > end {
         low = mid + 1
       } else {
-        return true
+        return false
       }
     }
-    false
+    true
   }
 }
 

unicodewidth_test.mbt

@@ -322,8 +322,8 @@ test "test_arabic_lam_alef" {
   assert_str_width("\u{6B8}\u{FE0E}\u{627}", 1, 1)
   assert_str_width("\u{6B8}\u{FE0F}\u{627}", 1, 1)
   assert_str_width("\u{6B8}\u{17B5}\u{627}", 1, 1)
-  assert_str_width("\u{644}\u{605}\u{623}", 1, 1)
-  assert_str_width("\u{6B8}\u{605}\u{627}", 1, 1)
+  assert_str_width("\u{644}\u{605}\u{623}", 2, 2)
+  assert_str_width("\u{6B8}\u{605}\u{627}", 2, 2)
   assert_str_width("\u{644}\u{644}\u{623}", 2, 2)
   assert_str_width("\u{644}\u{644}\u{627}", 2, 2)
   assert_str_width("\u{6B8}\u{6B8}\u{623}", 2, 2)