* Changed many files to use mkvalue() instead of newtupleobject().

* Fixcprt.py: added [-y file] option, do only files younger than file.
* modsupport.[ch]: added vmkvalue().
* intobject.c: use mkvalue().
* stringobject.c: added "formatstring"; renamed string* to string_*;
  ceval.c: call formatstring for string % value.
* longobject.c: close memory leak in divmod.
* parsetok.c: set result node to NULL when returning an error.

Python/ceval.c

@@ -1671,6 +1671,9 @@ rem(v, w)
 		DECREF(w);
 		return x;
 	}
+	if (is_stringobject(v)) {
+		return formatstring(v, w);
+	}
 	err_setstr(TypeError, "bad operand type(s) for %");
 	return NULL;
 }