branch master updated (4650a77 -> 4c8f997)

[Ludovic Courtès]

civodul pushed a change to branch master
in repository guix.

      from  4650a77   doc: Document polkit and elogind services.
       new  4c8f997   graph: Add '--expression'.

The 1 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
listed as "adds" were already present in the repository and have only
been added to this reference.


Summary of changes:
 doc/guix.texi          |   10 ++++++++++
 guix/scripts/graph.scm |   17 ++++++++++++-----
 tests/guix-graph.sh    |    5 +++++
 3 files changed, 27 insertions(+), 5 deletions(-)