Problem: Text properties corrupted with fo+=aw and backspace
Solution: Allocate line and move text properties
(zeertzjq)
closes: #14147
Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Insufficient tests for src/buffer.c.
Solution: Add more tests. Move comments related tests to a separate file.
(Yegappan Lakshmanan, closes#6325)