Custom message on `Live` overflow

[samuelcolvin]

Type of changes

• [ ] Bug fix
• [x] New feature
• [ ] Documentation / docstrings
• [ ] Tests
• [ ] Other

Checklist

• [x] I've run the latest black with default args on new code.
• [x] I've updated CHANGELOG.md and CONTRIBUTORS.md where appropriate.
• [x] I've added tests for new code.
• [x] I accept that @willmcgugan may be pedantic in the code review.

Description

Allow a custom message with a Live overflows, instead of an ellipsis.

[samuelcolvin]

Bump @willmcgugan, could we at least run tests.

(Curious why you don't allow tests to run for all PRs?)

[willmcgugan]

(Curious why you don't allow tests to run for all PRs?)

That used to be the case. Github changed it, and I haven't changed it back.

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 97.98%. Comparing base (45cc90b) to head (01bc82a). Report is 83 commits behind head on master.

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Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3702   +/-   ##
=======================================
  Coverage   97.98%   97.98%           
=======================================
  Files          74       74           
  Lines        8142     8147    +5     
=======================================
+ Hits         7978     7983    +5     
  Misses        164      164           

Flag	Coverage Δ
unittests	97.98% <100.00%> (+<0.01%)	:arrow_up:

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[samuelcolvin]

Perhaps a get_vertical_overflow_message method, so it could be customized in a subclass.

On Live or LiveRender or both?

[willmcgugan]

On Live or LiveRender or both?

I think just Live. LiveRender isn't user-facing.