Merge pull request #560 from chrisseaton/downloading-filename

Make the downloading message print the actual file name, not just the package name plus .tar.gz.

bin/ruby-build

@@ -262,7 +262,8 @@ fetch_tarball() {
   fi
 
   if ! reuse_existing_tarball "$package_filename" "$checksum"; then
-    echo "Downloading ${package_filename}..." >&2
+    local tarball_filename=$(basename $package_url)
+    echo "Downloading ${tarball_filename}..." >&2
     http head "$mirror_url" &&
     download_tarball "$mirror_url" "$package_filename" "$checksum" ||
     download_tarball "$package_url" "$package_filename" "$checksum"