Problem: Tests using term_wait() can still be flaky.
Solution: Increase the wait time when rerunning a test. (James McCoy,
closes#5899) Halve the initial times to make tests run faster
when there is no rerun.
Problem: With a long file name the hit-enter prompt appears. (J. Lewis
Muir)
Solution: When checking for text to wrap don't do this when outputing a CR.
Problem: "precedes" in 'listchars' not used properly.
Solution: Correctly handle the "precedes" char in list mode for long lines.
(Christian Brabandt, closes#4953)
Problem: Storing a zero byte from a multi-byte character causes fold text
to show up wrong.
Solution: Avoid putting zero in ScreenLines. (Christian Brabandt,
closes#1567)
Problem: Display problem with 'foldcolumn' and a wide character.
(esiegerman)
Solution: Don't use "extra" but an allocated buffer. (Christian Brabandt,
closes#1310)
