Problem:    Packadd test fails on MS-Windows.
Solution:   Ignore difference between forward and backward slashes.

Problem:    An "after" directory of a package is appended to 'rtp', which
            will be after the user's "after" directory. ()
Solution:   Insert the package "after" directory before any other "after"
            directory in 'rtp'. (closes #3409)

Problem:    'incsearch' for :/foo/s//<Esc> changes last search pattern.
Solution:   Save the last search pattern earlier.

Problem:    Vim may block on ch_sendraw() when the job is sending data back to
            Vim, which isn't read yet. (Nate Bosch)
Solution:   Add the "noblock" option to job_start(). (closes #2548)

Problem:    Some tests fail on Solaris.
Solution:   Skip writefile test. Fix path to libc.so. Improve test for Turkish
            case change. (Libor Bukata, Bjorn Linse, closes #3403)

Problem:    Building with Aap is outdated and unused.
Solution:   Remove the Aap build files.

Problem:    Cannot get the window id associated with the location list.
Solution:   Add the "filewinid" argument to getloclist(). (Yegappan
            Lakshmanan, closes #3202)

Problem:    'hlsearch' highlighting has a gap after /$.
Solution:   Remove suspicious code. (Ricky Zhou, closes #3400)

Problem:    :argadd in empty buffer changes the buffer name. (Pavol Juhas)
Solution:   Don't re-use the current buffer when not going to edit the file.
            (closes #3397)  Do re-use the current buffer for :next.

Problem:    No test for :spellinfo.
Solution:   Add a test. (Dominique Pelle, closes #3394)