buffer-disable-undo.
(Filling): Add cross-reference for hard newlines.
(Sorting): Fix indentation.
+ (Columns): Comment out undefined behavior.
2013-08-16 Xue Fuqiao <xfq.free@gmail.com>
When called interactively, @var{column} is the value of prefix numeric
argument. If @var{column} is not an integer, an error is signaled.
+@c This behavior used to be documented until 2013/08.
+@ignore
If column @var{column} is beyond the end of the line, point moves to
the end of the line. If @var{column} is negative, point moves to the
beginning of the line.
+@end ignore
If it is impossible to move to column @var{column} because that is in
the middle of a multicolumn character such as a tab, point moves to the