Update install instructions

Co-authored-by: Isaac Virshup <[email protected]>

Author: flying-sheep

docs/installation.rst

@@ -43,8 +43,8 @@ cloned version after you update with `git pull`) call::
 
 .. note::
 
-   Due to a `bug in pip`_, using pip’s editable install is more robust than `flit install -s`.
-   Note that this is currently nonstandard behavior and might no longer work once `setup.py` is gone::
+   Due to a `bug in pip`_, packages installed by `flit` can be uninstalled by normal pip operations.
+   For now, you can avoid this by using::
 
        pip install -e ".[dev,doc,test]"