Problem:    MacOS: build fails.
Solution:   Remove "#if 0" from timer_delete().

Problem:    :mkview test doesn't test much.
Solution:   Save the view with the folds closed. (James McCoy, closes #10596)

Problem:    Timeout implementation is not optimal.
Solution:   Further improvements for timeouts.  Add a test for searchpair()
            timeout. (partly by Paul Ollis)

Problem:    Edit test for mode message fails when using valgrind.
Solution:   Use WaitForAssert().  Run beep test later.

Problem:    Timeout handling is not optimal.
Solution:   Avoid setting timeout_flag twice.  Adjust the pointer when
            stopping the regexp timeout.  Adjust variable name.

Problem:    Syntax highlighting disabled when using synID() in searchpair()
            skip expression and it times out. (Jaehwang Jung)
Solution:   Add the redrawtime_limit_set flag. (closes #10562)

Problem:    Using assert_true() does not show value on failure.
Solution:   Use assert_inrange(). (closes #10593)

Problem:    Substitute may overrun destination buffer.
Solution:   Disallow switching buffers in a substitute expression.

Problem:    MS-Windows: warnings from MinGW compyler.
Solution:   Use "volatile". (Yasuhiro Matsumoto, closes #10589)  Initialize
            variable.

Problem:    When syntax timeout test fails it does not show the time.
Solution:   Use assert_inrange().