:
# Simple script that removes all trailing whitespace (tabs and spaces) from
# the standard input or a specified file.  It also compresses all leading
# tabs to spaces.

# Created by Kevin O'Connor.

if [ "$1" = "" ]; then
    sed -e 's/[	 ]*$//' -e ':rep
			   { s/^\(	*\)	/\1        /
			     t rep
			     }'
else
    mv "$1" "$1.strip!"
    sed -e 's/[	 ]*$//' -e ':rep
			   { s/^\(	*\)	/\1        /
			     t rep
			     }' < "$1.strip!" > "$1"
    rm "$1.strip!"
fi