expand man page on Ultrix

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expand(1)							     expand(1)

       expand, unexpand - expand tabs to spaces, and vice versa

       expand [-tabstop] [-tabn...] [file...]
       unexpand [-a] [file...]

       The command processes the named files or the standard input writing the
       standard output with tabs changed into  blanks.	 Backspace  characters
       are  preserved  into  the output and decrement the column count for tab
       calculations.  The command is useful for pre-processing character files
       (before	sorting,  looking at specific columns, and so forth) that con‐
       tain 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.

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

       -#   Sets tabstops the specified number of spaces (#) apart.

       -a   When used with unexpand, compresses file by inserting tabs for two
	    or more spaces.


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