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EXPAND(1)		  BSD General Commands Manual		     EXPAND(1)

NAME
     expand, unexpand — expand tabs to spaces, and vice versa

SYNOPSIS
     expand [-tabstop] [-tab1,tab2,...,tabn] file ...
     unexpand [-a] file ...

DESCRIPTION
     Expand processes the named files or the standard input writing the stan‐
     dard output with tabs changed into blanks.	 Backspace characters are pre‐
     served into the output and decrement the column count for tab calcula‐
     tions.  Expand is useful for pre-processing character files (before sort‐
     ing, looking at specific columns, etc.) that contain tabs.

     If a single tabstop argument is given, then tabs are set tabstop spaces
     apart instead of the default 8.  If multiple tabstops are given then the
     tabs are set at those specific columns.

     Unexpand puts tabs back into the data from the standard input or the
     named files and writes the result on the standard output.

     Option (with unexpand only):

     -a	   By default, only leading blanks and tabs are reconverted to maximal
	   strings of tabs.  If the -a option is given, then tabs are inserted
	   whenever they would compress the resultant file by replacing two or
	   more characters.

HISTORY
     The expand command appeared in 3.0BSD.

4th Berkeley Distribution	 June 9, 1993	     4th Berkeley Distribution
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