If \fIwch\fP refers to a spacing character,
then any previous character at that location is removed.
A new character specified by \fIwch\fP is
placed at that location with rendition specified by \fIwch\fP.
The cursor then advances to
the next spacing character on the screen.
If \fIwch\fP refers to a spacing character,
then any previous character at that location is removed.
A new character specified by \fIwch\fP is
placed at that location with rendition specified by \fIwch\fP.
The cursor then advances to
the next spacing character on the screen.