patch 8.0.0529: line in test commented out

Problem:    Line in test commented out.
Solution:   Uncomment the lines for character classes that were failing before
            8.0.0519. (Dominique Pelle, closes vim#1599)

patch 8.0.0528: highlight wrong text when 'wim' includes "longest"

Problem:    When 'wildmenu' is set and 'wildmode' has "longest" then the first
            file name is highlighted, even though the text shows the longest
            match.
Solution:   Do not highlight the first match. (LemonBoy, closes vim#1602)

patch 8.0.0527: leftover file from RISC OS

Problem:    RISC OS support was removed long ago, but one file is still
            included.
Solution:   Delete the file. (Thomas Dziedzic, closes vim#1603)

patch 8.0.0526: Coverity complains about possible negative value

Problem:    Coverity complains about possible negative value.
Solution:   Check return value of ftell() not to be negative.

patch 8.0.0525: completion for user command argument not tested

Solution:   Completion for user command argument not tested.
Problem:    Add a test.

patch 8.0.0524: folds messed up

Problem:    Folds are messed up when 'encodin' is "utf-8".
Solution:   Also set the fold character when it's not multi-byte.

patch 8.0.0523: dv} deletes part of a multi-byte character.

Problem:    dv} deletes part of a multi-byte character. (Urtica Dioica)
Solution:   Include the whole character.

patch 8.0.0522: Win32: when 'clipboard' is "unnamed" yyp does not work

Problem:    MS-Windows: when 'clipboard' is "unnamed" yyp does not work in a
            :global command.
Solution:   When setting the clipboard was postponed, do not clear the
            register.

patch 8.0.0521: GtkForm handling is outdated

Problem:    GtkForm handling is outdated.
Solution:   Get rid of event filter functions.  Get rid of GtkForm.width and
            .height.  Eliminate gtk_widget_size_request() calls. (Kazunobu
            Kuriyama)

patch 8.0.0520: using a function pointer while the function is known

Problem:    Using a function pointer instead of the actual function, which we
            know.
Solution:   Change mb_ functions to utf_ functions when already checked for
            Unicode. (Dominique Pelle, closes vim#1582)