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# 4 tabs
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cat $1 | sed 's/^ \([^ ]\)/ \1/g' > $1.tmp
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# 3 tabs
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cat $1.tmp | sed 's/^ \([^ ]\)/ \1/g' > $1.tmp2
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# 2 tabs
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cat $1.tmp2 | sed 's/^ \([^ ]\)/ \1/g' > $1.tmp
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# 1 tab
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cat $1.tmp | sed 's/^ \([^ ]\)/ \1/g' > $1.tmp2
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rm $1.tmp
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echo done: $1.tmp2
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