Allow blank line to be commented in tsv

common/src/util.cpp

@@ -394,7 +394,7 @@ std::vector<std::vector<std::string>> util::readTSV(std::string_view tsvFilename
     if (line.back() == '\n')
       line.pop_back();
 
-    if (line.size() < 3)
+    if (line.size() == 0)
     {
       if (!inputHasBeenRead)
         continue;
@@ -420,8 +420,7 @@ std::vector<std::vector<std::string>> util::readTSV(std::string_view tsvFilename
   if (not mcdLine.empty())
     for (auto & sentence : sentences)
      sentence.insert(sentence.begin(), mcdLine);
-  
+
   return sentences;
 }
 
-