fixed new tense structure in next-resourc/demo

lib/next-resource/demo/DemoSpa.gf

@@ -0,0 +1,16 @@
+--# -path=.:alltenses
+
+concrete DemoSpa of Demo = 
+  NounSpa,
+  ClauseSpa,
+  AdjectiveSpa,
+  AdverbSpa,
+  NumeralSpa,
+  QuestionSpa,
+  StructuralSpa,
+  LexiconSpa
+  ** {
+
+flags language = es; unlexer = text ; lexer = text ;
+
+} ;