A number of packages doesn't really make sense in the name of the section to
be substituted. This change allows using simply '*** new packages' instead of
'*** 1999 new packages', for example, and have the update-NEWS.scm script
update it.
* build-aux/update-NEWS.scm (write-packages-added) <regexp>: Do not care about
leading white space in the name of the section.
The lists of new and upgraded packages in 'NEWS' had become way too long
and redundant with what 'guix pull' reports.
* build-aux/update-NEWS.scm (write-packages-added): Don't print ADDED.
(write-packages-updates)[important, table, latest, noteworthy]: New
variables.
Print NOTEWORTHY rather than all of UPGRADED.
(main): Print PREVIOUS-VERSION and NEW-VERSION.
* build-aux/update-NEWS.scm: New file.
* Makefile.am (EXTRA_DIST): Add it.
(GUIX_MAINTENANCE_DIRECTORY): New variable.
(update-NEWS): New target.
(.PHONY): Add it.
