patch 8.0.0473: no test covering arg_all()

Problem:    No test covering arg_all().
Solution:   Add a test expanding ##.

patch 8.0.0472: when a test fails another test may also fail

Problem:    When a test fails and test.log is created, Test_edit_CTRL_I
            matches it instead of test1.in.
Solution:   Match with runtest.vim instead.

patch 8.0.0471: exit callback test sometimes fails

Problem:    Exit callback test sometimes fails.
Solution:   Add it to the list of flaky tests.

patch 8.0.0470: not enough testing for help commands

Problem:    Not enough testing for help commands.
Solution:   Add a few more help tests. (Dominique Pelle, closes vim#1565)

patch 8.0.0469: compiler warnings on MS-Windows

Problem:    Compiler warnings on MS-Windows.
Solution:   Add type casts. (Christian Brabandt)

patch 8.0.0468: after aborting an Ex command g< does not work

Problem:    After aborting an Ex command g< does not work. (Marcin
            Szamotulski)
Solution:   Postpone clearing scrollback messages to until the command line
            has been entered.  Also fix that the screen isn't redrawn if after
            g< the command line is cancelled.

patch 8.0.0467: using g< after :for does not show the right output

Problem:    Using g< after :for does not show the right output. (Marcin
            Szamotulski)
Solution:   Call msg_sb_eol() in :echomsg.

patch 8.0.0466: still macros that should be all-caps

Problem:    There are still a few macros that should be all-caps.
Solution:   Make a few more macros all-caps.

patch 8.0.0465: off-by-one error in using :move with folding

Problem:    Off-by-one error in using :move with folding.
Solution:   Correct off-by-one mistakes and add more tests. (Matthew
            Malcomson)

patch 8.0.0464: can't find executable name on Solaris and FreeBSD

Problem:    Can't find executable name on Solaris and FreeBSD.
Solution:   Check for "/proc/self/path/a.out". (Danek Duvall) And for
            "/proc/curproc/file".