Example: how to list conflicting constraints

[jd-foster]

This adds an example to the notes on how to get all conflicting constraints in an arbitrary way from a model.

[codecov]

Codecov Report

Merging #2605 (a96f407) into master (1abc179) will not change coverage.
The diff coverage is n/a.

❗ Current head a96f407 differs from pull request most recent head 93f4821. Consider uploading reports for the commit 93f4821 to get more accurate results

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##           master    #2605   +/-   ##
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  Coverage   93.47%   93.47%           
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  Files          44       44           
  Lines        5547     5547           
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  Hits         5185     5185           
  Misses        362      362           

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[odow]

@blegat did something change in the last couple of days???
https://github.com/jump-dev/JuMP.jl/pull/2605/checks?check_run_id=2624301638#step:5:622

@jd-foster the documentation failure doesn't look like it was caused by this PR.

[odow]

Ah, it was this: JuliaLang/Compat.jl#729

[jd-foster]

I was messing with git commit messages; looks like a force-push updated this branch, and now requires re-doing actions

[odow]

No problem. In future there's also no need to squash commits. I can do that from the web interface when merging :)

[jd-foster]

Ah, thanks. Good to know you can do it on your side in the future.