Make `Base.show` more compact

[jlchan]

On main:

julia> rd = RefElemData(Wedge(), 1)
RefElemData for a degree 1 Polynomial{StartUpDG.DefaultPolynomialType}() approximation on Wedge{NTuple{5, UnitRange{Int64}}}((1:4, 5:8, 9:12, 13:15, 16:18)) element.

This PR:

julia> rd = RefElemData(Wedge(), 1)
RefElemData for a degree 1 Polynomial approximation on a Wedge element.

[jlchan]

@Davknapp FYI I removed using LinearAlgebra from src/RefElemData_TensorProductWedge.jl since this loads everything exported by the package. I added UniformScaling to using LinearAlgebra: ..., UniformScaling, .... in src/StartUpDG.jl instead.

[codecov[bot]]

Codecov Report

Merging #135 (314c49b) into main (5bd016a) will increase coverage by 0.07%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #135      +/-   ##
==========================================
+ Coverage   97.50%   97.57%   +0.07%     
==========================================
  Files          25       25              
  Lines        3001     3010       +9     
==========================================
+ Hits         2926     2937      +11     
+ Misses         75       73       -2     

Impacted Files	Coverage Δ
src/RefElemData_polynomial.jl	100.00% <ø> (ø)
src/StartUpDG.jl	100.00% <ø> (ø)
src/RefElemData.jl	98.01% <100.00%> (+2.23%)	:arrow_up:
src/RefElemData_TensorProductWedge.jl	100.00% <100.00%> (ø)

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