[Pm-utils] remove_parameters() function is broken

[Peter Wegas]

the remove_parameters() function in /usr/lib/pm-utils/functions tries to use
grep to remove parameters from the parameter list:

"if [ "$1" = "all" ]; then
echo '' > "$PARAMETERS.new"
else
echo '' >"$PARAMETERS.rm"
for p in "$@"; do
echo "$p" >> "$PARAMETERS.rm"
done
# let grep do the dirty work.
grep -vxFf "$PARAMETERS.rm" "$PARAMETERS" > "$PARAMETERS.new"
fi"

but since $PARAMETERS.rm has an empty line at the beginning, grep will just
write $PARAMETERS to sdtout.
this behavior of grep is intented.
see:http://lists.gnu.org/archive/html/bug-grep/2010-04/msg00037.html

Peter
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