ADD: generated lexer string test

TestGeneratedLexer/Tests.cs

@@ -39,6 +39,15 @@ namespace TestGeneratedLexer
             Assert.AreEqual(14.5, lexer.sumDouble, 0.001);
         }
         
+        [Test]
+        public void TestString()
+        {
+            LexerAddon lexer = new LexerAddon(@"3 389 3 'ssfsf ' ");
+            lexer.Lex();
+            
+            // TODO: checks in this test
+        }
+        
         [Test]
         public void TestSingleLineCmt()
         {