New way of writing $pkgdesc

PKGBUILD

@@ -62,7 +62,7 @@ package() {
   cd linux
   # get real compiled kernel version
   kernrel=$(make kernelrelease)
-  pkgdesc="$pkgdesc, version $kernrel"
+  pkgdesc+=", version $kernrel"
   pkgname="linux-$kernrel"
   pkgver=$(make kernelversion|tr '-' '_')
   provides=("linux=$pkgver" "linux-headers=$pkgver")