Avoid OtherPackagesLoadedInAdvance

[fingolfin]

Recent GAP versions include _StripEscapeSequences, use that instead of
StripEscapeSequences from GAPDoc

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 74.51%. Comparing base (50aca12) to head (becd0fc).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/JuliaInterface/gap/utils.gi	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1155      +/-   ##
==========================================
- Coverage   74.52%   74.51%   -0.01%     
==========================================
  Files          55       55              
  Lines        4714     4713       -1     
==========================================
- Hits         3513     3512       -1     
  Misses       1201     1201              

Files with missing lines	Coverage Δ
pkg/JuliaInterface/PackageInfo.g	90.26% <ø> (-0.09%)	⬇️
pkg/JuliaInterface/gap/utils.gi	24.61% <0.00%> (ø)

[ThomasBreuer]

Very good.
(When we removed the OtherPackagesLoadedInAdvance from GAP, we had just checked that this removal does not affect packages that are distributed with GAP, and JuliaInterface is not a distributed package.)