Merge pull request #164 from sureshsundriyal/wip

[pretty print] Avoid extra new lines.

src/pretty_printer.hh

@@ -111,7 +111,7 @@ public:
             this->pp_values.push_back(el);
         }
         this->flush_values();
-        this->pp_stream << std::endl << std::ends;
+        this->pp_stream << std::ends;
 
         return this->pp_stream.str();
     };

test/datafile_xml.0

@@ -18,4 +18,3 @@ pair  51:61                                                     ^--------^  <clo
     <elem attr1=xyz attr2="123">  </elem>
 
     <closed />
-