Use double brackets everywhere

We already fixed a couple of these in previous patches - this one should
replace all remaining uses of single brackets ("[") by double brackets.
Also, use arithmetic evaluation instead of conditional expressions where
appropriate and make use of "-z" and "-n" instead of comparing variables
to empty strings.

Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/archco.in b/archco.in
index be026b1..5d34209 100644
--- a/archco.in
+++ b/archco.in
@@ -4,7 +4,7 @@ m4_include(lib/common.sh)
 
 scriptname=${0##*/}
 
-if [ "$1" = '' ]; then
+if [[ -z $1 ]]; then
 	echo 'Usage: '$scriptname' <package name>...'
 	exit 1
 fi