Update # needs

Author: Matthias Koeppe

src/sage/matrix/special.py

@@ -1295,12 +1295,12 @@ def elementary_matrix(arg0, arg1=None, **kwds):
         Full MatrixSpace of 4 by 4 dense matrices over
          Number Field in I with defining polynomial x^2 + 1 with I = 1*I
 
-        sage: # needs sage.rings.complex_double
+        sage: # needs sage.rings.complex_double sage.symbolic
         sage: E = elementary_matrix(4, row1=1, scale=CDF(I))
         sage: E.parent()
         Full MatrixSpace of 4 by 4 dense matrices over Complex Double Field
 
-        sage: # needs sage.rings.number_field
+        sage: # needs sage.rings.number_field sage.symbolic
         sage: E = elementary_matrix(4, row1=1, scale=QQbar(I))
         sage: E.parent()
         Full MatrixSpace of 4 by 4 dense matrices over Algebraic Field

src/sage/stats/basic_stats.py

@@ -79,7 +79,7 @@ def mean(v):
         NaN
         sage: mean([I, sqrt(2), 3/5])                                                   # needs sage.symbolic
         1/3*sqrt(2) + 1/3*I + 1/5
-        sage: mean([RIF(1.0103,1.0103), RIF(2)])
+        sage: mean([RIF(1.0103,1.0103), RIF(2)])                                        # needs sage.rings.real_interval_field
         1.5051500000000000?
         sage: mean(range(4))
         3/2