Resolve some method ambiguities

[fingolfin]

No description provided.

[codecov]

Codecov Report

Merging #1569 (9329689) into master (978dd47) will decrease coverage by 0.04%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #1569      +/-   ##
==========================================
- Coverage   84.21%   84.17%   -0.04%     
==========================================
  Files          94       94              
  Lines       36634    36642       +8     
==========================================
- Hits        30850    30845       -5     
- Misses       5784     5797      +13     

Files	Coverage Δ
src/flint/fmpq_mpoly.jl	86.20% <0.00%> (-0.32%)	⬇️
src/flint/fmpz_mpoly.jl	86.20% <0.00%> (-0.34%)	⬇️
src/flint/fq_nmod_mpoly.jl	90.40% <0.00%> (-0.37%)	⬇️
src/flint/nmod_mpoly.jl	97.53% <0.00%> (-0.38%)	⬇️

... and 4 files with indirect coverage changes

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