further corrections (in my opinion) on subquotients
Merge branch 'public/combinat/interval-posets-15683' of git://trac.sagemath.org/sage into tamarinew
add reference to elliptic_j in j_invariant_qexp
trac 16224: make sure maxima_lib knows about bessel functions.
 Furthermore, max_to_sr and sr_to_max will now raise an error if they would
 overwrite an entry in a translation dictionary. This probably will make such
 corruptions due to mistranslations a little easier to diagnose.
 Finally, if you reraise an error in an except, it's better to do so by a bare
 "raise": that way the backtrace remains intact, which makes for better
 debugging.
Trac 10963: proofread Darij's changes
Merge branch 'develop' into u/tscrim/ticket/15919
some improvements (i think), not done yet
some more edits
Trac 10963: proofread Darij's changes

In particular, removed an old warning in
Sets.ParentMethods._element_constructor_from_element_class which was
outdated by #14519.
Trac 10963: proofreading of Darij's doc change and minor further edits
Trac 10963: trivial doctest update w.r.t. #16125 (Implement method _an_element_ for Words)
Trac 10963: trivial doctest update w.r.t. merge of develop (matrix spaces now have one more method)
Trac 10963: trivial doctest update w.r.t. #15240 (Switch lattice polytopes to point collections)
Merge remote-tracking branch 'trac/develop' into ticket/15646
FSMState.is_final and final_word_out are properties

Only final states are allowed to have a final output word. Thus is_final and final_word_out are implemented as properties with setters where this constraint is checked.
Merge branch 'develop=6.2.rc0' into ticket/15919-unrank
- Use __getitem__ only on sequences and Parents not in EnumeratedSets
- Use Python's collection to detect sequences and iterables
- Catch less exceptions
FSMState.__deepcopy__ also copies final_word_out
Fixed issues reported on trac server comment 28 and 29.

1) _fast_eval does not use the parameter 'check'. Simply remove (from both _fast_eval functions)

2) @lazy_attribute function needs the documentation string + an example

2b) in the @lazy_attribute. Put the 'prime' and 'degree' inside the 'if' block so they are only computed if they are needed.

3) There is an extra blank line in _fast_eval for finite fields that can be removed

4) I'd like to see a few more doctests in _fast_eval. Maybe

a) Powerseries ring

b) quotient ring

max(abs(c.lift()) for c in coefficients)
Changed doctest for fast_eval.