fix: minor space typo in the AbsAlgAssMor output after decomposition of group_algebra

[Fe-r-oz]

It seems there is a minor space typo as there is no space after order 5 in the output below:

julia> C = abelian_group(5);

julia> GA = group_algebra(GF(3), C);

julia> d = decompose(GA);

julia> d[1][2]
Map
  from structure constant algebra of dimension 1 over GF(3)
  to group algebra of group of order 5over GF(3)

I think the first output line is printed correctly from:

Hecke.jl/src/AlgAss/StructureConstantAlgebra.jl

Lines 362 to 363 in 3f9f55b

	print(io, "Structure constant algebra of dimension ", dim(A), " over ")
	print(terse(io), Lowercase(), base_ring(A))

It seems the typo is due to this line, no space before over, it should be " over " as in the earlier clause

Hecke.jl/src/AlgAss/AlgGrp.jl

Line 185 in 3f9f55b

print(io, "over ")

Please help review this PR, thank you!

[lgoettgens]

This unfortunately creates a double-space in the case of an infinite group. To resolve this, I think the cleanest solution would be to revert your change here and instead add a trailing space to the print in line 181

[Fe-r-oz]

Thank you for your suggestion! Hopefully this works okay.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.06%. Comparing base (3f9f55b) to head (9be2f47).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1715   +/-   ##
=======================================
  Coverage   76.06%   76.06%           
=======================================
  Files         361      361           
  Lines      114378   114377    -1     
=======================================
  Hits        86999    86999           
+ Misses      27379    27378    -1     

Files with missing lines	Coverage Δ
src/AlgAss/AlgGrp.jl	75.12% <100.00%> (ø)

... and 29 files with indirect coverage changes