Problem:    File missing from distribution.
Solution:   Add the github code analyses file.

Problem:    Amiga: no common build file for Amiga (-like) systems.
Solution:   Turn Make_morph.mak into Make_ami.mak. (Ola Söder, closes #6805)

Problem:    The channel source file is too big.
Solution:   Move job related code to a new source file.

Problem:    Pull requests on github do not notify a maintainer.
Solution:   Add a CODEOWNERS file with a few initial entries.

Problem:    Cannot translate messages in a Vim script.
Solution:   Add gettext().  Try it out for a few messages in the options
            window.

Problem:    The user cannot try out emoji character widths.
Solution:   Move the emoji script to the runtime/tools directory.

Problem:    Cannot get the class of a character; emoji widths are wrong in
            some environments.
Solution:   Add charclass(). Update some emoji widths.  Add script to check
            emoji widths.

Problem:    Error messages are spread out and names can be confusing.
Solution:   Start moving error messages to a separate file and use clear
            names.

Problem:    Tiny and small builds have no test coverage.
Solution:   Restore tests that do not depend on the +eval feature.
            (Ken Takata, closes #6696)

Problem:    The Mac GUI implementation is outdated and probably doesn't even
            work.
Solution:   Remove the Mac GUI code.  The MacVim project provides the
            supported Vim GUI version.