#2378 Wrap line changes in 9292 (cc7e8dd305cb)

[Zufu Liu]

widthLine used inside LineLayout::WrapLine() is diff from origin code with width, due to

if (FlagSet(vstyle.wrap.visualFlags, WrapVisualFlag::End)) {
    width -= static_cast<int>(vstyle.aveCharWidth); // take into account the space for end wrap mark
}

attached a patch that pass updated width as XYPOSITION wrapWidth to WrapLine(), also including small change to wrapIndent computing.

[Neil Hodgson]

Committed fix with [91f198].