commit 5e1e7d0eb481a6ea49443f67ef3e710faf6ce0ca
Author: Tanmai Khanna <khanna.tanmai@gmail.com>
Date:   Mon Jul 6 17:28:04 2020 +0530

    fix blank combining

diff --git a/apertium/transfer.cc b/apertium/transfer.cc
index 9879a7b..0bc0433 100644
--- a/apertium/transfer.cc
+++ b/apertium/transfer.cc
@@ -301,10 +301,18 @@ Transfer::gettingLemmaFromWord(string attr)
 string
 Transfer::combineWblanks(string wblank_current, string wblank_to_add)
 {
-  if(wblank_current.empty())
+  if(wblank_current.empty() && wblank_to_add.empty())
+  {
+    return wblank_current;
+  }
+  else if(wblank_current.empty())
   {
     return wblank_to_add;
   }
+  else if(wblank_to_add.empty())
+  {
+    return wblank_current;
+  }
   
   string new_out_wblank;
   for(string::const_iterator it = wblank_current.begin(); it != wblank_current.end(); it++)