TDB2 parsing

- TDB2::load_lines was splitting the text on \n, but because the last
  line contains \n, there was an additional blank line.  This is what
  split_minimal is for.
- split_minimal contained a copy/paste bug that added the extra line
  if the input was non-trivial, instead of if the remainder was non-
  trivial.
- Fixed incorrect unit test accordingly.

src/TDB2.cpp

@@ -25,6 +25,7 @@
 //
 ////////////////////////////////////////////////////////////////////////////////
 
+//#include <iostream> // TODO Remove.
 #include <Context.h>
 #include <text.h>
 #include <TDB2.h>
@@ -287,13 +288,8 @@ void TF2::load_lines ()
   if (! _loaded_contents)
     load_contents ();
 
-  split (_lines, _contents, '\n');
+  split_minimal (_lines, _contents, '\n');
   _loaded_lines = true;
-
-/*
-  if (_lines.back () == "")
-    _lines.pop_back ();
-*/
 }
 
 ////////////////////////////////////////////////////////////////////////////////