-If a character in \fIwstr\fP is a tab, newline, carriage return or
-backspace, the cursor is moved appropriately within the window.
-A newline also does a \fBclrtoeol\fP before moving.
-Tabs are considered to be at every eighth column.
-If a character in \fIwstr\fP is another control character,
-it is drawn in the \fB^\fIX\fR notation.
-Calling \fBwin_wch\fP after adding a control character
-(and moving to it, if necessary)
-does not return the control character,
-but instead returns a character in the ^-representation
-of the control character.
+Functions with a \*(``mv\*('' prefix first perform a cursor movement using
+\fBwmove\fP(3X), and return an error if the position is outside the window,
+or if the window pointer is null.