fix: harfbuzz formatting

src/harfbuzz/pkg.sh

@@ -1,13 +1,15 @@
 NAME="harfbuzz"
 DESC="OpenType text shaping engine"
 VERSION="8.1.1"
-FILES=("https://github.com/harfbuzz/harfbuzz/releases/download/$VERSION/harfbuzz-$VERSION.tar.xz")
+
+FILES=("https://github.com/harfbuzz/harfbuzz/releases/download/${VERSION}/harfbuzz-${VERSION}.tar.xz")
 HASHES=("f0040d0fc02cf94cac9f46a94c44c6de")
+
 DEPENDS=("gobject-introspection" "glib" "icu" "freetype" "cairo")
 
 PACKAGE() {
-  tar xf $NAME-$VERSION.tar.xz
-  cd $NAME-$VERSION
+  tar xf "${NAME}-${VERSION}.tar.xz"
+  cd "${NAME}-${VERSION}"
 
   mkdir build
   cd    build
@@ -16,7 +18,8 @@ PACKAGE() {
       --prefix=/usr       \
       --buildtype=release \
       -Dgraphite2=enabled
-  ninja && DESTDIR=${ROOTDIR} ninja install
+  ninja
+  DESTDIR="${ROOTDIR}" ninja install
 
-  cd ../.. && rm -rf $NAME-$VERSION
+  cd ../.. && rm -rf "${NAME}-${VERSION}"
 }