=== modified file 'common.zsh'
--- common.zsh	2017-12-12 10:18:26 +0000
+++ common.zsh	2017-12-12 10:16:37 +0000
@@ -31,7 +31,7 @@
 decode_argstr() {
 	local base
 	base=${BASE##*/}
-	[[ -n $base || $base == '%' ]] && return
+	[[ $base == % || -n $base ]] && return
 	tr <<<$base _- /+ | base64 -d \
 		|| die "Unable to decode: ${(qqq)base}"
 }