I use GNU textutils 2.0 on linux.  expand converts all spaces to tabs when -a is not specified.  I read the document.  It says
 
`-a'
`--all'
     Convert all strings of two or more spaces or tabs, not just initial
     ones, to tabs.
Should unexpand convert only initial spaces and tabs to tabs without -a?  Is there any way to turn -a off?
 
Can I search bug reports on the internet?

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