BUG: Do not display VT100 escapes inside emacs even if TERM is set to xterm.

Source/kwsys/Terminal.c

@@ -160,6 +160,15 @@ static const char* kwsysTerminalVT100Names[] =
 static int kwsysTerminalStreamIsVT100(FILE* stream, int default_vt100,
                                       int default_tty)
 {
+  /* If running inside emacs the terminal is not VT100.  Some emacs
+     seem to claim the TERM is xterm even though they do not support
+     VT100 escapes.  */
+  const char* emacs = getenv("EMACS");
+  if(emacs && *emacs == 't')
+    {
+    return 0;
+    }
+
   /* Check for a valid terminal.  */
   if(!default_vt100)
     {