sage.tests: Update # needs

Author: Matthias Koeppe

src/sage/tests/book_stein_modform.py

@@ -1,4 +1,5 @@
-# sage.doctest: needs sage.modular
+# sage_setup: distribution = sagemath-repl
+# sage.doctest: needs sage.libs.flint sage.modular
 """
 This file contains a bunch of tests extracted from the published book
 'Modular Forms: a Computational Approach' by William Stein, AMS 2007.