trac #174xx cleanup of doc (mainly) in quiver_mutation_type
trac #17432 imperative mode (Return !) and a few more line breaks
17438: implement coeff list
trac #17432 more work on long lines, and wikipedia role
17438: deprecate ex.coeff/coeffs()
17438: implement ex.list()
initialilzing with stuff from 2.8, with new patches added, and old commented
cleaning up
bumped up to p0, due to patches we apply
Merge branch 'u/chapoton/17432' into 6.5.b2
trac #17432 correct bullet list and wikipedia role
Remove unused database modules
Make modular exponentiation of polynomial using FLINT interruptable.
Better fix for exponentiation of polys using FLINT nmod and test.
Cleanup exponentiation for polynomial over finite fields using FLINT.
Trac #17393: Add a domain warning to Expression.simplify_log().

The Expression.simplify_log() method should only be used on
expressions with real variables. This is implicit in the description,
but it deserves an explicit warning as well. This commit adds a
warning with an (counter)example over the complex numbers.

A few other minor improvements were made to the documentation:

  * Variables 'a', 'b', 'c', and 'd' are used instead of 'a1', 'a2',
    'b1', and 'b2' which could be misinterpreted given that they
    appeared in "math mode."

  * A test case that appeared under EXAMPLES was moved to TESTS.

  * The DETAIL section was mostly removed, since it was at best
    redundant but mostly irrelevant.

  * The underlying Maxima call was moved to an ALGORITHM section.

  * Small grammar and quoting cleanups.
Trac #17393: Fix doctest failure introduced in previous commit.
Modify FLINT exponentiation test to pass with <= 2Gb of virtual mem.
preliminary patch; main work done but a lot of doctests to go
PARI bindings for Galois theory