minor improvements

[ThomasBreuer]

• renamed representative_action to is_conjugate_with_data, as suggested by @fieker (but keep representative_action as an alias),
• support the syntax tbl % p for constructing p-modular character tables, as suggested by @fieker,
• added some tests for describe(projective_general_linear_group(n, q)) and describe(projective_special_linear_group(n, q)),
• mention more differences between Julia and GAP

[ThomasBreuer]

"5 failing, 6 successful, and 1 cancelled checks":
The 5 failing checks end with "The operation was canceled."
The other one (Run tests / test (nightly, macOS-latest) was "Cancelled after 150m".

[thofma]

Should all be #2441.

[ThomasBreuer]

I have restarted the failed tests, the required test with Julia 1.6 is now expected to succeed (see the discussion of #2441) ...

No, it was again cancelled.

[codecov]

Codecov Report

Merging #2609 (a109fac) into master (995942d) will decrease coverage by 0.03%.
Report is 2 commits behind head on master.
The diff coverage is 73.68%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2609      +/-   ##
==========================================
- Coverage   72.13%   72.11%   -0.03%     
==========================================
  Files         429      429              
  Lines       60531    60532       +1     
==========================================
- Hits        43667    43651      -16     
- Misses      16864    16881      +17     

Files Changed	Coverage Δ
src/Groups/matrices/MatGrp.jl	94.05% <57.14%> (ø)
src/Groups/GAPGroups.jl	82.80% <60.00%> (ø)
experimental/QuadFormAndIsom/src/embeddings.jl	96.10% <100.00%> (ø)
.../QuadFormAndIsom/src/hermitian_miranda_morrison.jl	72.49% <100.00%> (ø)
src/Groups/GrpAb.jl	90.82% <100.00%> (ø)
src/Groups/group_characters.jl	88.23% <100.00%> (+0.01%)	⬆️
src/Groups/gsets.jl	91.00% <100.00%> (ø)
src/Groups/matrices/linear_isconjugate.jl	100.00% <100.00%> (ø)

... and 4 files with indirect coverage changes

[ThomasBreuer]

The required test test (1.6, ubuntu-latest) (pull_request) found an error at test/AlgebraicGeometry/Schemes/duValSing.jl:16, which is not likely to be related to the changes from this pull request.

Restarted this test.

[thofma]

Probably #2531

[ThomasBreuer]

@thofma Yes, probably.
(The same happened with other pull requests, for example #2410 and #2528, and also in oscar-system/GAP.jl/pull/925; running the failed test again usually helps.)