trac 15719: Update documentation in ArithmeticSubgroupElement
fr tut: missing labels
trac #15719: Rebase on 6.1.rc0
trac #15719: Fix for the doc problems in graph/
trac #15719: Fix the doc problems in combinat/designs/
Trac #15719: Fix documentation bugs

The following documentation bugs need to be fixed for Sage-6.1:
{{{
[combinat ] /usr/local/src/sage-git/local/lib/python2.7/site-
packages/sage/combinat/designs/block_design.py:docstring of
sage.combinat.designs.block_design:3: WARNING: Block quote ends without
a blank line; unexpected unindent.
[combinat ] /usr/local/src/sage-git/local/lib/python2.7/site-
packages/sage/combinat/designs/block_design.py:docstring of
sage.combinat.designs.block_design:22: WARNING: Block quote ends without
a blank line; unexpected unindent.
[combinat ] /usr/local/src/sage-git/local/lib/python2.7/site-
packages/sage/combinat/designs/block_design.py:docstring of
sage.combinat.designs.block_design.ProjectiveGeometryDesign:6: ERROR:
Undefined substitution referenced: "F|^{d+1}-1} {|F".

[arithgrou] docstring of sage.modular.arithgroup.arithgroup_element.Arit
hmeticSubgroupElement.acton:46: WARNING: Literal block expected; none
found.

[graphs   ] /home/release/Sage/src/doc/en/reference/graphs/sage/graphs/g
eneric_graph.rst:312: WARNING: autodoc can't import/find function
'sage.graphs.generic_graph._scream_if_not_simple', it reported error:
"_scream_if_not_simple", please check your spelling and sys.path
[graphs   ] /home/release/Sage/local/lib/python2.7/site-
packages/sage/graphs/graph.py:docstring of
sage.graphs.graph.Graph.is_tree:16: WARNING: Inline interpreted text or
phrase reference start-string without end-string.
[graphs   ] /home/release/Sage/local/lib/python2.7/site-
packages/sage/graphs/graph.py:docstring of sage.graphs.graph:16:
WARNING: Block quote ends without a blank line; unexpected unindent.
[graphs   ] /home/release/Sage/src/doc/en/reference/graphs/sage/graphs/g
raph_generators.rst:6: WARNING: Duplicate explicit target name:
"corresponding wolfram page".
[graphs   ] /home/release/Sage/src/doc/en/reference/graphs/sage/graphs/g
raph_generators.rst:6: WARNING: Duplicate explicit target name: "wolfram
page".

[tutorial ] /home/release/Sage/src/doc/fr/tutorial/latex.rst:454:
WARNING: undefined label: sec-sagetex (if the link has no caption the
label must precede a section header)
[tutorial ] /home/release/Sage/src/doc/fr/tutorial/tour_linalg.rst:87:
WARNING: undefined label: section-rings (if the link has no caption the
label must precede a section header)
}}}

URL: http://trac.sagemath.org/15719
Reported by: vbraun
Ticket author(s): Marc Mezzarobba, Martin Raum, Nathann Cohen
Reviewer(s): Volker Braun
Updated Sage version to 6.1