Add LollipopGraph

[marinaanagno]

No description provided.

[samanthaharper]

I think this is perfect, except that it should return an immutable digraph, so you need to update that and update the documentation.

[wilfwilson]

Currently one of the PR status checks is failing: the new 'codecov/patch' one. This means you've added or changed code that isn't correspondingly covered by tests.

You can see the bits of your added/changed code that don't have code coverage by following the "Details" link next to the failing codecov/patch PR status check.

In particular, that link will tell you "Added line #L402 was not covered by tests".

You can also see this information by looking for 'codecov' comments on the diff: https://github.com/digraphs/Digraphs/pull/417/files

[wilfwilson]

I think this is looking good! As with the other PRs, there will unfortunately be merge conflicts to resolve when you next update with the master branch. Let me know if that's trouble.

Otherwise, I have some requests about the documentation, and some suggestions for further properties to set about the lollipop graph.

[wilfwilson]

I've fixed some things that got broken by the merge conflicts, and also I addressed my remaining requested changes from #417 (comment) which you had already marked as resolved 😉 . I think this can be merged if the tests pass for a final time.

[marinaanagno]

I've fixed some things that got broken by the merge conflicts, and also I addressed my remaining requested changes from #417 (comment) which you had already marked as resolved 😉 . I think this can be merged if the tests pass for a final time.

Ooops I'm so sorry! I don't know how I did this! Apologies! :)
Thank you so much for all this help!