1. What is the difference b/w pywikibot-core/compat and core/compat? Do i need to install both?

2. I wish to fix the bug 57995 - Add function for list=watchlistraw. On the gerrit page(https://gerrit.wikimedia.org/r/#/c/100363/). A couple of patches have been uploaded but I cant view the given links. Also, I am assuming that I need to continue where others left but how do I know what parts of the bugs have been fixed?