branch core-updates updated (c263cfd -> ff3ca79)

[guix-commits]

civodul pushed a change to branch core-updates
in repository guix.

    from c263cfd  Merge branch 'master' into core-updates
     new 4ba4250  channels: Add 'latest-channel-instance'.
     new 053b10c  channels: Add mechanism to patch checkouts of the 'guix 
channel.
     new ff3ca79  channels: Add patch for <https://bugs.gnu.org/41028>.

The 3 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
listed as "add" were already present in the repository and have only
been added to this reference.


Summary of changes:
 guix/channels.scm  | 97 +++++++++++++++++++++++++++++++++++++++++++++---------
 guix/git.scm       |  1 +
 tests/channels.scm | 64 ++++++++++++++++++-----------------
 3 files changed, 117 insertions(+), 45 deletions(-)