tab manages the tab key, typically inserts n tabs. The effect of the command is determined by:
$buffer-indent(5), is non-zero then the effect of tab is defined by the setting of bit 0x1000 of variable
$system(5), typically it resets the current line indentation or inserts a tab.
If a tab is to be inserted and this mode is enabled then multiple spaces are used instead of tab characters, see
Copyright (c) 1998-2006 JASSPA
Last Modified: 2005/01/16
Generated On: 2006/10/07