extensions: process disabled external paths when `hgext` package is in-memory...
extensions: process disabled external paths when `hgext` package is in-memory
This fixes `hg help -e ambiguous` in test-helpt.t:2055 with the
`ambiguous = !./ambiguous.py` configuration, when `hgext` is not in the
filesystem (e.g. pyoxidizer builds with in-memory resources, or TortoiseHg with
py2exe), but the disabled external extension is. Now instead of aborting with a
suggestion to try `--keyword`, the help command prints text for the extension.