tokio-techbook: fix linting errors

device/testing/device-tokio-techbook/APKBUILD

 # Reference: <https://postmarketos.org/devicepkg>
-pkgname="device-tokio-techbook"
+pkgname=device-tokio-techbook
 pkgdesc="Tokio Techbook"
 pkgver=0.32
 pkgrel=0
@@ -11,8 +11,8 @@ depends="postmarketos-base linux-tokio-techbook mesa-dri-swrast mkbootimg uboot-
 makedepends="devicepkg-dev"
 
 source="
-    deviceinfo
-    uboot-script.cmd
+	deviceinfo
+	uboot-script.cmd
 "
 
 build() {

device/testing/linux-tokio-techbook/APKBUILD

 # Reference: <https://postmarketos.org/vendorkernel>
 # Kernel config based on: arch/arm/configs/vt8500_v6_v7_defconfig
 
-pkgname="linux-tokio-techbook"
+pkgname=linux-tokio-techbook
 pkgver=4.3.0
 pkgrel=0
 pkgdesc="Tokio Techbook kernel fork (mainline 4.3.0)"
@@ -14,8 +14,9 @@ options="!strip !check !tracedeps"
 makedepends="perl sed installkernel bash gmp-dev bc linux-headers elfutils-dev devicepkg-dev"
 
 # Compiler: latest GCC from Alpine
-HOSTCC="${CC:-gcc}"
-HOSTCC="${HOSTCC#${CROSS_COMPILE}}"
+# Note: linter complains if the rows does not begin with tab...?
+	HOSTCC="${CC:-gcc}"
+	HOSTCC="${HOSTCC#${CROSS_COMPILE}}"
 
 
 # Source
@@ -23,14 +24,14 @@ HOSTCC="${HOSTCC#${CROSS_COMPILE}}"
 # https://github.com/torvalds/linux/commit/6a13feb9c82803e2b815eca72fa7a9f5561d7861
 _repository="linux"
 _commit="6a13feb9c82803e2b815eca72fa7a9f5561d7861"
-_config="config-${_flavor}.${arch}"
+_config="config-$_flavor.$arch"
 source="
-	$pkgname-$_commit.tar.gz::https://github.com/torvalds/${_repository}/archive/${_commit}.tar.gz
+	$pkgname-$_commit.tar.gz::https://github.com/torvalds/$_repository/archive/$_commit.tar.gz
 	$_config
 	gcc8-fix-put-user.patch
 "
 
-builddir="$srcdir/${_repository}-${_commit}"
+builddir="$srcdir/$_repository-$_commit"
 
 prepare() {
 	default_prepare