commit 725d31f1ce4cb24d4597475ecb3dfb24e6b06da0
Author: Tanmai Khanna <khanna.tanmai@gmail.com>
Date:   Sun Jul 19 13:37:00 2020 +0530

    output wordbound blank when no rule matches in single stage transfer

diff --git a/apertium/transfer.cc b/apertium/transfer.cc
index 0bc0433..821aae3 100644
--- a/apertium/transfer.cc
+++ b/apertium/transfer.cc
@@ -2440,6 +2440,7 @@ Transfer::transfer(FILE *in, FILE *out)
 	  {
 	    if(defaultAttrs == lu)
 	    {
+        fputws_unlocked(tr_wblank.c_str(), output);
         if(tr.first[0] != L'[' || tr.first[1] != L'[')
         {
           fputwc_unlocked(L'^', output);