debuginstall: print if Rust extensions are installed...
debuginstall: print if Rust extensions are installed
This should make it easier to use the Rust extensions.
Another patch on will be exposing a version and more useful information, but
it can only be done on top of this very patch, since it is targeting the stable
branch and the API has already changed on the default branch.
Differential Revision:
https://phab.mercurial-scm.org/D8248