assertion failed errors when trying to git subtree split

This was probably due to the backslashes in --prefix (I was running Windows back then.)

Split -P can't gracefully handle directory path . Use following command instead -

git subtree split --prefix=plugins/rg-feed-client -b rg-feed-client

A few points to remember -

1. Avoid prefixing ./ with path i.e instead of ./plugins/rg-feed-client use plugins/rg-feed-client

2. Avoid any trailing / after the path , i.e NO plugins/rg-feed-client/