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/archrm.in b/archrm.in
index a4830ee..7c7139b 100644
--- a/archrm.in
+++ b/archrm.in
@@ -2,7 +2,7 @@
 
 m4_include(lib/common.sh)
 
-if [ "$1" = '' ]; then
+if [[ -z $1 ]]; then
 	echo 'Usage: archrm <path to checkout>'
 	exit 1
 fi