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
the obvious updates
Merge branch 'public/ticket/15977' of ssh://trac.sagemath.org:22/sage into 15977
changelog update
Trac #16874: Update cvxopt to 1.1.7

use the upstream tarball at

https://github.com/cvxopt/cvxopt/archive/1.1.7.tar.gz

(put it in `SAGE_ROOT/upstream/', and checkout the branch, as usual)

URL: http://trac.sagemath.org/16874
Reported by: dimpase
Ticket author(s): Dima Pasechnik
Reviewer(s): François Bissey
Trac #15977: Fix formatting for symbolic summation algorithms

The formatting for the algorithm options for symbolic summation, e.g.
[http://www.sagemath.org/doc/reference/calculus/sage/calculus/calculus.h
tml#sage.calculus.calculus.symbolic_sum here],
is wrong.

URL: http://trac.sagemath.org/15977
Reported by: kcrisman
Ticket author(s): Karl-Dieter Crisman
Reviewer(s): Frédéric Chapoton