Problem:    Cannot have a comment halfway an expression in an autocmd command
            block.
Solution:   When skipping over the NL also skip over comments. (closes #10519)

Problem:    CI checkout step title is a bit cryptic.
Solution:   Add a better title. (closes #10509)

Problem:    Check for autocmd_add() event argument is confusing.
Solution:   Make the code more straightforward.

Problem:    Using freed memory when searching for pattern in path.
Solution:   Make a copy of the line.

Problem:    Insufficient tests for autocommands.
Solution:   Add a few more tests. (Yegappan Lakshmanan, closes #10507)

Problem:    When using XIM the gui test may fail.
Solution:   Only use --not-a-term when not using XIM.

Problem:    CurSearch highlight is often wrong.
Solution:   Remember the last highlighted position and redraw when needed.

Problem:    vim_regsub() can overwrite the destination.
Solution:   Pass the destination length, give an error when it doesn't fit.

Problem:    Can escape a terminal popup window when the job is finished.
Solution:   Only check for a finished job where it is relevant.
            (closes #10253)

Problem:    Command line test fails.
Solution:   Also beep when cmdline win can't be opened because of locks.
            Make the test not beep.  Make the test pass on MS-Windows.