Tests for "vaBiB", end could be wrong.
Also test ":s/pat/sub/" with different ~s in sub.

STARTTEST
/Start cursor here
vaBiBD:?Bug?,$w! test.out
/^- Bug
:s/u/~u~/
:s/i/~u~/
:s/o/~~~/
:.w >>test.out
:qa!
ENDTEST

- Bug in "vPPPP" on this text (Webb):
	{
		cmd;
		{
			cmd;	/* <-- Start cursor here */
			{
			}
		}
	}