Use bash features to improve $distfiles parsing.

That means that it's not necessary anymore to use an '@' before the
extract suffix string. yay.

--HG--
extra : convert_revision : 83ce2c783cb917ef59b87eacb0565cfcff277218

templates/gtk+.tmpl

@@ -3,7 +3,7 @@ pkgname=gtk+
 version=2.14.3
 patch_files="$pkgname-tests-Makefile-in.diff"
 distfiles="
-http://ftp.gnome.org/pub/GNOME/sources/gtk+/2.14/$pkgname-$version@.tar.bz2"
+http://ftp.gnome.org/pub/GNOME/sources/gtk+/2.14/$pkgname-$version.tar.bz2"
 build_style=gnu_configure
 configure_args="--disable-cups"
 make_cmd="$XBPS_MASTERDIR/bin/gmake"