bubblebabble is wrong for empty strings #2956
Description
$ ruby -rdigest/bubblebabble -e "p Digest.bubblebabble ''"
"xexax"
$ bin/jruby -rdigest -e "p Digest.bubblebabble ''"
"xx"
Also see #2955
{{ message }}
$ ruby -rdigest/bubblebabble -e "p Digest.bubblebabble ''"
"xexax"
$ bin/jruby -rdigest -e "p Digest.bubblebabble ''"
"xx"
Also see #2955