pkg: fix content

Author: Maxython

packages/termux-tools/pkg

@@ -7,11 +7,13 @@ fi
 
 show_help() {
 	local cache_size
+	local cache_dir
 	if [ "$TERMUX_MAIN_PACKAGE_FORMAT" = "debian" ]; then
-		cache_size=$(du -sh @TERMUX_CACHE_DIR@/apt/archives 2>/dev/null | cut -f1)
+		cache_dir="@TERMUX_CACHE_DIR@/apt/archives"
 	elif [ "$TERMUX_PACKAGE_FORMAT" = "pacman" ]; then
-		cache_size=$(du -sh @TERMUX_PREFIX@/var/cache/pacman/pkg 2>/dev/null | cut -f1)
+		cache_dir="@TERMUX_PREFIX@/var/cache/pacman/pkg"
 	fi
+	cache_size=$(du -sh "$cache_dir" 2>/dev/null | cut -f1)
 
 	echo 'Usage: pkg command [arguments]'
 	echo