SYNTAX            : ARG ;A

RESULTING ARGUMENT: None

FUNCTION          : Convert multiple spaces to TABs to compress a text
                    without changing the layout. The size of a TAB is
                    taken from the corresponding CTRL_X-setting.

                    The counterpart for ;A is ;B.

ARGUMENT          : The number of lines to convert.

DEFAULT           : 1

NOTE              : The first line is only converted if the cursor is at
                    the beginning of the line.

MATRIX