Check tlist properties

[albertomercurio]

Checklist

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Description

I add some checks on the tlist argument. It throws an error if tlist is either empty, not sorted or containing repeated values.

Related issues or PRs

Fixes #377

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.41%. Comparing base (2f0ce8e) to head (37b7b9b).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #378      +/-   ##
==========================================
+ Coverage   93.32%   93.41%   +0.08%     
==========================================
  Files          43       43              
  Lines        2803     2809       +6     
==========================================
+ Hits         2616     2624       +8     
+ Misses        187      185       -2     

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