Problem:    ModifyOtherKeys cannot be temporarily disabled.
Solution:   Add echoraw() with an example for modifyOtherKeys.

Problem:    Cannot recognize a terminal in a popup window.
Solution:   Add the win_gettype() function.

Problem:    test_clear_search_pat() is unused.
Solution:   Remove the function. (Yegappan Lakshmanan, closes #5624)

Problem:    Crash when using garbagecollect() in between rand().
Solution:   Redesign the rand() and srand() implementation. (Yasuhiro
            Matsumoto, closes #5587, closes #5588)

Problem:    Missing search/substitute pattern hardly tested.
Solution:   Add test_clear_search_pat() and tests. (Yegappan Lakshmanan,
            closes #5579)

Problem:    Fnamemodify() does not apply ":~" when followed by ":.".
Solution:   Don't let a failing ":." cause the ":~" to be skipped. (Yasuhiro
            Matsumoto, closes #5577)

Problem:    Kotlin files are not recognized.
Solution:   Detect Kotlin files. (Alkeryn, closes #5560)

Problem:    Not recognizing .gv file as dot filetype.
Solution:   Add *.gv to dot pattern. (closes #5544)