sage.rings: More # optional

Author: Matthias Koeppe

src/sage/rings/function_field/function_field_rational.py

@@ -134,7 +134,7 @@ def __init__(self, constant_field, names, category=None):
 
         EXAMPLES::
 
-            sage: K.<t> = FunctionField(CC); K
+            sage: K.<t> = FunctionField(CC); K                                          # optional - sage.rings.real_mpfr
             Rational function field in t over Complex Field with 53 bits of precision
             sage: TestSuite(K).run()               # long time (5s)