workaround for svg jupyter issue

[pedritomelenas]

Workaroung for svg displaying problems in jupyter jupyterlab/jupyterlab#10464

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 26 lines in your changes missing coverage. Please review.

Project coverage is 26.14%. Comparing base (62de7e7) to head (4410d3e).
Report is 5 commits behind head on master.

Files with missing lines	Patch %	Lines
gap/JupyterUtil.gi	0.00%	26 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #135      +/-   ##
==========================================
- Coverage   26.32%   26.14%   -0.19%     
==========================================
  Files          14       14              
  Lines         870      876       +6     
==========================================
  Hits          229      229              
- Misses        641      647       +6     

Files with missing lines	Coverage Δ
gap/JupyterUtil.gi	9.37% <0.00%> (-0.63%)	⬇️

[pedritomelenas]

Please, do not merge. If the svg is too big it will be cut.
This does not happen in vscode, but it does on any browseer.
I am trying to figure out how to bring up a scroll bar in this case.

[pedritomelenas]

now it seems to work; there was also a problem with "-o" in Linux; it works for macos

[pedritomelenas]

@ManuelAFDelgado mentions that it does not work on linux; I will check that.
Please do not merge

[pedritomelenas]

Did some changes. For some reason the output of Base64String was not usable under macos, and so I rely on base64 -i. @ManuelAFDelgado, please check!

[ManuelAFDelgado]

Everything works perfectly with the examples I checked. Thank you @pedritomelenas.