Bug#787846: Please accept --upgradeable as synonym for --upgradable

[Josh Triplett <josh@joshtriplett.org>]

Package: apt
Version: 1.0.9.10
Severity: normal

apt list accepts --upgradable, but not --upgradeable.  However,
elsewhere apt uses both interchangeably, and uses the latter in named
options:

~$ grep -i upgradeable /etc/cron.daily/apt
#  APT::Periodic::Download-Upgradeable-Packages "0";
#  APT::Periodic::Download-Upgradeable-Packages-Debdelta "1";
DownloadUpgradeableInterval=0
eval $(apt-config shell DownloadUpgradeableInterval APT::Periodic::Download-Upgradeable-Packages)
eval $(apt-config shell Debdelta APT::Periodic::Download-Upgradeable-Packages-Debdelta)
   [ $DownloadUpgradeableInterval -eq 0 ] &&
# download all upgradeable packages (if it is requested)
DOWNLOAD_UPGRADEABLE_STAMP=/var/lib/apt/periodic/download-upgradeable-stamp
if [ $UPDATED -eq 1 ] && check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $DownloadUpgradeableInterval; then
        update_stamp $DOWNLOAD_UPGRADEABLE_STAMP
# auto upgrade all upgradeable packages
~$ grep -i upgradable /etc/cron.daily/apt
        debug_echo "download upgradable (success)"
        debug_echo "download upgradable (error)"
    debug_echo "download upgradable (not run)"


So, please consider accepting both spellings for "apt list", and please
consider auditing usage of the two throughout apt.

- Josh Triplett

-- Package-specific info:

-- (no /etc/apt/preferences present) --


-- (/etc/apt/sources.list present, but not submitted) --


-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.0.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages apt depends on:
ii  debian-archive-keyring  2014.3
ii  gnupg                   1.4.19-3
ii  libapt-pkg4.12          1.0.9.10
ii  libc6                   2.19-18
ii  libgcc1                 1:5.1.1-9
ii  libstdc++6              5.1.1-9

apt recommends no packages.

Versions of packages apt suggests:
pn  apt-doc     <none>
ii  aptitude    0.6.11-1+b1
ii  dpkg-dev    1.18.1
ii  python-apt  0.9.4

-- no debconf information