Fix display of GRangesList

[jkanche]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 64.99%. Comparing base (a514661) to head (8dcc9db).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/genomicranges/grangeslist.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #161      +/-   ##
==========================================
+ Coverage   55.05%   64.99%   +9.94%     
==========================================
  Files           9        8       -1     
  Lines        2027     1717     -310     
  Branches      362      310      -52     
==========================================
  Hits         1116     1116              
+ Misses        777      467     -310     
  Partials      134      134              

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