Improved sed scripts, thanks to ColdWind

bash_completion

@@ -1011,8 +1011,9 @@ _killall()
 		_signals
 	else
 		COMPREPLY=( $( compgen -W '$( command ps axo command | \
-			      sed -ne "1d; s/^\[\?\([^-][^] ]*\).*$/\1/p" | \
-			      sed -e "s/.*\///" -e "s/:$//")' -- $cur ) )
+			           sed -e "1d; s/ .*//g; s:^/.*/::g; s/:$//g;" \
+			               -e "s/^-//g; s/^\[//g; s/\]$//g; s:/.*::g")' \
+			           -- $cur ) )
 	fi
 
 	return 0