tests: make hg frame optional
When `hg` is a Rust binary, the `hg` frame doesn't exist because an
`hg` Python script doesn't exist.
This commit updates expected test output to make the `hg` frame
optional.
There /might/ be a way to do this more accurately with the
"(feature !)" syntax in .t files. However, I poked at it for a
few minutes and couldn't get it to work. Worst case with using
(?) is we drop the frame from output for Python `hg`. The `hg`
frame isn't terribly important. So the worst case doesn't feel that
bad. If someone wants to enlighten me on how to use "(feature !)"
for optional output based on hghave features, I'd be more than
willing to update this.
Differential Revision: https://phab.mercurial-scm.org/D1858
Mercurial
=========
Mercurial is a fast, easy to use, distributed revision control tool
for software developers.
Basic install::
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
Running without installing::
$ make local # build for inplace usage
$ ./hg --version # should show the latest version
See https://mercurial-scm.org/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.