Fixing formatting of the algorithm options for symbolic sums
Merge branch 'u/kcrisman/ticket/15977' of ssh://trac.sagemath.org:22/sage into 15977
trac #15977 corrected links to trac
trac #15977 correction of one indentation
Merge branch 'public/ticket/15977' of ssh://trac.sagemath.org:22/sage into 15977

Conflicts:
	src/sage/symbolic/expression.pyx
16165: add doctest
Adding a weighted_degree function to Singular multivariate polynomials

See trac 10716
matrices for transformations between symmetric function bases should have their entries lie in the base ring
weird that this worked for QSym; still let's do it right
fix a mathematical mistake of mine
another attempt at breaking preservation of bugs
because [1,3,1,4] is in need of flattening
revisiting some high quality work...
Use Integer instead of int to avoid overflows
Bernstein creation operators on Sym and NSym
Corrected typo #10716
trac #16682: fix random_element in polynomial ring
trac #16682: the zero polynomial has degree -1
manual merge
Ticket: 10716
Make sure that the method works for polydicts.
Do not use ETuples.