Fixing ns cavity and more pretty printing

[fverdugo]

No description provided.

[codecov-io]

Codecov Report

Merging #111 into master will increase coverage by 0.09%.
The diff coverage is 80%.

@@            Coverage Diff             @@
##           master     #111      +/-   ##
==========================================
+ Coverage   91.78%   91.88%   +0.09%     
==========================================
  Files          87       87              
  Lines        4639     4656      +17     
==========================================
+ Hits         4258     4278      +20     
+ Misses        381      378       -3

Impacted Files	Coverage Δ
src/MultiField/MultiFESpaces.jl	80.24% <0%> (-4.17%)	⬇️
src/FESpaces/FESpaces.jl	84.53% <100%> (+0.66%)	⬆️
src/FESpaces/ConstrainedFESpaces.jl	97.82% <100%> (+0.15%)	⬆️
src/FESpaces/ZeroMeanFESpaces.jl	100% <100%> (ø)	⬆️
src/FESpaces/FEFunctions.jl	83.87% <100%> (+0.53%)	⬆️
src/MultiField/MultiFEFunctions.jl	76.92% <100%> (+3.01%)	⬆️
src/FESpaces/FEOperators.jl	81.9% <100%> (ø)	⬆️
src/CellValues/Kernels.jl	87.36% <0%> (+1.05%)	⬆️
src/Fields/CellFieldsOperations.jl	91.86% <0%> (+1.16%)	⬆️
src/CellValues/CellArrayApply.jl	95.91% <0%> (+2.04%)	⬆️
... and 3 more

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