This test should be run on an 80-column wide screen.
0         1         2         3         4         5         6         7
01234567890123456789012345678901234567890123456789012345678901234567890123456789
Here are some DWCs: ０１２３４５６７８９ Followed by regular text.
Here is a long line with a DWC that doesn't span followed by text: xxxxxxxxxxx０abc
Here is a long line with a DWC that wants to span lines: xxxxxxxxxxxxxxxxxxxxxx０abc
Here are two lines of DWCs, both with a DWC spanning a line:
0         1         2         3         4         5         6         7         8         9        10        11        12        13        14        15
0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789
.Ｌｏｒｅｍｉｐｓｕｍｄｏｌｏｒｓｔａｍｅｔｃｏｎｓｅｃｔｅｔｕｒａｄｉｐｉｓｉｃｉｎｇｅｌｉｔｓｅ.ｄｄｏｅｉｕｓｍｏｄｔｅｍｐｏｒｉｎｃｉｄｉｄｕｎｔｕｔｌａｂｏｒｅｅｔ
This is the end.
